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A HAND SLIT-LAMP
642
NEW INVENTIONS
evidence favouring the theory that the incidence of cancer is affected by diet. Sir FREDERICK HOBDAY spoke on dietetics as applied to veterinary medicine. A careful adjustment of diet had been successful in eliminating certain bowel diseases of horses. Since the instruction was given in large studs that horses were not to be allowed to drink a large quantity of water immediately after feeding, but to take water before feeding, the amount of colic had greatly decreased. A further factor was that horses, thanks to the eight-hour day for their drivers, were not nearly so overworked as in former years, and the disappearance of excessive fatigue had
contributed to the same result. Asthma and allied ailments were quite common among horses and other animals which were fed irregularly, and various illnesses attacked dogs which were pampered and were not given the hard dog biscuits on which others flourished. The work done on calcium deficiency disease in cattle saved the agriculturists in this country a large sum of money every year. Sir ARNOLD THEILER spoke of mineral deficiency diseases in herbivorous animals as observed in South Africa ; and Mr. H. H. GREEN of an acute intoxication found in cattle, which promptly disappeared when. the animal was fed with phosphorus.
NEW INVENTIONS the top of the tube, with its end in the angle between the tube and eyepiece ; the forefinger lies along the side, so tip of the finger can rest against the THE value of the standard forms of slit-lamps for that the projecting cheek at the lower border of the orbit. This patient’s certain ophthalmic is undoubted. But contact gives steady support. Alternate crooking and the immobility of these large instruments limits their straightening the forefinger brings the lamp nearer or further from the eye and gives focusing for depth. use to the and clinic. Adjustments of the instrument are of the fewest, normally The hand slit-lamp illustrated has been devised the eyepiece alone is likely to require setting. But the setting of the lamp bulb, in case of replacement, needs with the intent of securing an instrument that could attention. The filament must be horizontal and in the be used as readily and as easily as an electric axis of the system. Whether or no this adjustment is correct can be seen by looking at the face of the projection moscope, so that it can be carried about and used ’1’l1A lwiQ’l1t, Unf of He’ht should cut the lens horizontallv with ease for the examination of children and patients lAY>" into two equal parts. If in bed or in their own this line is not true the homes. It cannot by position of the filament must be altered. The reason of its small lamp mount is pivoted :size compete with the at its front end on a large instruments in horizontal axis on trunAt the back nions. magnification and in there are a screw and a fine resolution of spring on a vertical detail. Yet it will axis, the one lifting the - secure a valuable view back, the other allowof the media of the ing it to fall. As the back rises, so the filaas the as eye deep ment is lowered and .anterior part of the vice versa, the movevitreous. The small ment being made by releasing or screwing in lamp as compared The the lower screw. -with the large might distance between the be said to have somelamp and the condenser thing like the relation system can be varied of the two-thirds inch by loosening the large) headed screw under the D screw the controllingthe and lamp of the microthe A spring In the diagram, represents objective end of the tube and c the centre contact the of lamp trunnion, the B indicates position centre. scope to the one-sixth of the lamp, and E the clamping screw. Note that in practice the filamentt allowing the tube to slide But inch objective. over the lamp stem and slit are horizontal. a little. This largethe small lamp gives headed screw should be turned firmly when the adjustment the same effect of depth as the large lamp, so that has been made. Once the adjustment is obtained it need its value for localisation is certain. not be altered until a new lamp is required. It is better not to wear spectacles when using the lamp The lamp is fitted to the battery handle of an electric that one’s eye can be well within the shield of the ocular. ophthalmoscope, or a small adapter can be supplied with so It is well not to over-run the electric bulb, so when a new ,leads to a torch battery or other suitable source of current. battery is used the switch to the rheostat should be turned At the upper end, set at right-angles to the ophthalmoscope on no more than two-thirds until the battery weakens. handle, is an eyepiece consisting of a triple achromatic lens "giving a linear magnification of x 12. The lens holder is The hand slit-lamp is made by Messrs. of so made that other powered lenses can be substituted. The ’case of the eyepiece is graven with a scale, so that the focus New Bond-street, London. of the lens, once found, can always be recovered. N. BISHOP HARMAN, F.R.C.S. Below the eyepiece, and at an angle of 45° to it, is the projection combination, forming a horizontal slit of light at a distance of one inch. It comprises a gas-filled lamp with a single-strand filament, made for two-cell or three-cell WORK OF WOMEN’S HOSPITALS.-The report for dry batteries. The centre pole of the lamp abuts on to a 1932 of the Royal Waterloo Hospital for Women and spring contact, so that all lamps can be set with the filament ;horizontal. A powerful condensing system produces an Children states that there were 2300 in-patients and ’image of the filament upon a slit fixed in the tube, so that 14,740 new out-patients ; the latter made over 76,000 the projection lens, an achromatic lens of some 60 dioptres, attendances. There is an accumulated deficit of .65000.— - can form a clear image of this slit, free from disturbing haze The Birmingham and Midlands Hospital for Women (the or filament irregularities. Women’s Hospital, Sparkhill, and the Maternity Hospital) In use, the instrument must be kept steady in relation ,to,the eye of the patient, and yet allow focusing for depth. ind the district midwives last year dealt with 6462 patients. This can be obtained by the following manoeuvre. The The pressure on the beds at Sparkhill was " greater than ’lamp is held by the main tube with the battery handle or ever "-there were 2666 patients. The average cost per is a There trigger-like spur -adapter hanging down. tube, and this lies conveniently in-patient was 10s. 8d. per day. There were 1734 in-patients ,projecting below the main at the Maternity Hospital. between the second and third fingers. The thumb rests on
A HAND SLIT-LAMP
investigations
consulting-room
ophthal-
Rayner
NEW INVENTIONS
evidence favouring the theory that the incidence of cancer is affected by diet. Sir FREDERICK HOBDAY spoke on dietetics as applied to veterinary medicine. A careful adjustment of diet had been successful in eliminating certain bowel diseases of horses. Since the instruction was given in large studs that horses were not to be allowed to drink a large quantity of water immediately after feeding, but to take water before feeding, the amount of colic had greatly decreased. A further factor was that horses, thanks to the eight-hour day for their drivers, were not nearly so overworked as in former years, and the disappearance of excessive fatigue had
contributed to the same result. Asthma and allied ailments were quite common among horses and other animals which were fed irregularly, and various illnesses attacked dogs which were pampered and were not given the hard dog biscuits on which others flourished. The work done on calcium deficiency disease in cattle saved the agriculturists in this country a large sum of money every year. Sir ARNOLD THEILER spoke of mineral deficiency diseases in herbivorous animals as observed in South Africa ; and Mr. H. H. GREEN of an acute intoxication found in cattle, which promptly disappeared when. the animal was fed with phosphorus.
NEW INVENTIONS the top of the tube, with its end in the angle between the tube and eyepiece ; the forefinger lies along the side, so tip of the finger can rest against the THE value of the standard forms of slit-lamps for that the projecting cheek at the lower border of the orbit. This patient’s certain ophthalmic is undoubted. But contact gives steady support. Alternate crooking and the immobility of these large instruments limits their straightening the forefinger brings the lamp nearer or further from the eye and gives focusing for depth. use to the and clinic. Adjustments of the instrument are of the fewest, normally The hand slit-lamp illustrated has been devised the eyepiece alone is likely to require setting. But the setting of the lamp bulb, in case of replacement, needs with the intent of securing an instrument that could attention. The filament must be horizontal and in the be used as readily and as easily as an electric axis of the system. Whether or no this adjustment is correct can be seen by looking at the face of the projection moscope, so that it can be carried about and used ’1’l1A lwiQ’l1t, Unf of He’ht should cut the lens horizontallv with ease for the examination of children and patients lAY>" into two equal parts. If in bed or in their own this line is not true the homes. It cannot by position of the filament must be altered. The reason of its small lamp mount is pivoted :size compete with the at its front end on a large instruments in horizontal axis on trunAt the back nions. magnification and in there are a screw and a fine resolution of spring on a vertical detail. Yet it will axis, the one lifting the - secure a valuable view back, the other allowof the media of the ing it to fall. As the back rises, so the filaas the as eye deep ment is lowered and .anterior part of the vice versa, the movevitreous. The small ment being made by releasing or screwing in lamp as compared The the lower screw. -with the large might distance between the be said to have somelamp and the condenser thing like the relation system can be varied of the two-thirds inch by loosening the large) headed screw under the D screw the controllingthe and lamp of the microthe A spring In the diagram, represents objective end of the tube and c the centre contact the of lamp trunnion, the B indicates position centre. scope to the one-sixth of the lamp, and E the clamping screw. Note that in practice the filamentt allowing the tube to slide But inch objective. over the lamp stem and slit are horizontal. a little. This largethe small lamp gives headed screw should be turned firmly when the adjustment the same effect of depth as the large lamp, so that has been made. Once the adjustment is obtained it need its value for localisation is certain. not be altered until a new lamp is required. It is better not to wear spectacles when using the lamp The lamp is fitted to the battery handle of an electric that one’s eye can be well within the shield of the ocular. ophthalmoscope, or a small adapter can be supplied with so It is well not to over-run the electric bulb, so when a new ,leads to a torch battery or other suitable source of current. battery is used the switch to the rheostat should be turned At the upper end, set at right-angles to the ophthalmoscope on no more than two-thirds until the battery weakens. handle, is an eyepiece consisting of a triple achromatic lens "giving a linear magnification of x 12. The lens holder is The hand slit-lamp is made by Messrs. of so made that other powered lenses can be substituted. The ’case of the eyepiece is graven with a scale, so that the focus New Bond-street, London. of the lens, once found, can always be recovered. N. BISHOP HARMAN, F.R.C.S. Below the eyepiece, and at an angle of 45° to it, is the projection combination, forming a horizontal slit of light at a distance of one inch. It comprises a gas-filled lamp with a single-strand filament, made for two-cell or three-cell WORK OF WOMEN’S HOSPITALS.-The report for dry batteries. The centre pole of the lamp abuts on to a 1932 of the Royal Waterloo Hospital for Women and spring contact, so that all lamps can be set with the filament ;horizontal. A powerful condensing system produces an Children states that there were 2300 in-patients and ’image of the filament upon a slit fixed in the tube, so that 14,740 new out-patients ; the latter made over 76,000 the projection lens, an achromatic lens of some 60 dioptres, attendances. There is an accumulated deficit of .65000.— - can form a clear image of this slit, free from disturbing haze The Birmingham and Midlands Hospital for Women (the or filament irregularities. Women’s Hospital, Sparkhill, and the Maternity Hospital) In use, the instrument must be kept steady in relation ,to,the eye of the patient, and yet allow focusing for depth. ind the district midwives last year dealt with 6462 patients. This can be obtained by the following manoeuvre. The The pressure on the beds at Sparkhill was " greater than ’lamp is held by the main tube with the battery handle or ever "-there were 2666 patients. The average cost per is a There trigger-like spur -adapter hanging down. tube, and this lies conveniently in-patient was 10s. 8d. per day. There were 1734 in-patients ,projecting below the main at the Maternity Hospital. between the second and third fingers. The thumb rests on
A HAND SLIT-LAMP
investigations
consulting-room
ophthal-
Rayner