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Handbook of chemistry and physics
ROLT, 1:.H.
Gauges and Fine Measurements. Two volumes. 1929. Principles of Farm Mechanics. 1930. Partly based on Tanners MemoTRUMPER, MAX. Memoranda of Toxicology. randa of Poisons. Second edition. 1929. WHETHAM, WILLIAM CECIL DAMPIER DAMPIER. A History of Science and Its Relations with Philosophy and Religion. 1929. IIandbuch tier Experimentalphysik. Band WIEN. W., AND F. HARMS, editors. SHARP, &I. .k, AND VV. M. SHARP.
IO.
1930.
BOOK
REVIEWS.
HANDBOOK OF CHEMISTRY AND PHYSICS. By Charles Norbert A. Lange, Ph.D. Fourteenth Edition. Cleveland, Chemical Rubber Publishing leather.
D. Hodgman,
M.S.
and
1386 pages, I2mo, limp Company, 1929. Price,
$5.00. Books of this character, now fairly numerous and applicable to almost all the applied sciences, are of great use to those who are in regular scientific work, containing as they do a vast amount of data not readily available elsewhere. The merit of a book of this kind will depend upon the judgment in selecting the data, upon the care with which the figures are transcribed, the mechanical execution, quality of the paper, clearness of type and convenience in size. The book in hand having reached a fourteenth edition has shown its merits. It corresponds to the requirements just stated, and is a very valuable addition to the library of the chemist or physirist. NATIONAL ADVISORY COMMITTEE FOR A~~ROX.%~TICS. Report No. 330. Experimental and Analytical Determination of the Motion of Hydraulically Operated Valve Stems in Oil Engine Injection Systems. By A. G. Gelalles and A. M. Rothrock. 20 pages, illustrations, quarto. Washington, Government Printing Office, 1930. Price ten cents. This research on the pressure variations in the injection system of the N.A.C.A. spray photography equipment and on the effects of these variations on the motion of the timing valve stem was undertaken in connection with the study of fuel injection systems for high-speed oil engines. The spray photography equipment employed for these tests consists of a fuel injection system for producing an oil spray, an electrical spark system for illuminating the spray, and a photographic camera for recording its development. The fuel injection system contains a high-pressure hand pump for producing the injection pressures, an oil reservoir for maintaining the pressures of the fuel during the injection, a timing valve for timing the start of the oil spray, an injection valve for atomizing the oil, and a by-pass valve for controlling the cut-off of the spray. Additions were made to the apparatus in order to record the motion of the timing valve stem photographically. The timing valve stem was held against its seat by a helical spring so adjusted that the total hydraulic force on the stem actuated it immediately after it had
Gauges and Fine Measurements. Two volumes. 1929. Principles of Farm Mechanics. 1930. Partly based on Tanners MemoTRUMPER, MAX. Memoranda of Toxicology. randa of Poisons. Second edition. 1929. WHETHAM, WILLIAM CECIL DAMPIER DAMPIER. A History of Science and Its Relations with Philosophy and Religion. 1929. IIandbuch tier Experimentalphysik. Band WIEN. W., AND F. HARMS, editors. SHARP, &I. .k, AND VV. M. SHARP.
IO.
1930.
BOOK
REVIEWS.
HANDBOOK OF CHEMISTRY AND PHYSICS. By Charles Norbert A. Lange, Ph.D. Fourteenth Edition. Cleveland, Chemical Rubber Publishing leather.
D. Hodgman,
M.S.
and
1386 pages, I2mo, limp Company, 1929. Price,
$5.00. Books of this character, now fairly numerous and applicable to almost all the applied sciences, are of great use to those who are in regular scientific work, containing as they do a vast amount of data not readily available elsewhere. The merit of a book of this kind will depend upon the judgment in selecting the data, upon the care with which the figures are transcribed, the mechanical execution, quality of the paper, clearness of type and convenience in size. The book in hand having reached a fourteenth edition has shown its merits. It corresponds to the requirements just stated, and is a very valuable addition to the library of the chemist or physirist. NATIONAL ADVISORY COMMITTEE FOR A~~ROX.%~TICS. Report No. 330. Experimental and Analytical Determination of the Motion of Hydraulically Operated Valve Stems in Oil Engine Injection Systems. By A. G. Gelalles and A. M. Rothrock. 20 pages, illustrations, quarto. Washington, Government Printing Office, 1930. Price ten cents. This research on the pressure variations in the injection system of the N.A.C.A. spray photography equipment and on the effects of these variations on the motion of the timing valve stem was undertaken in connection with the study of fuel injection systems for high-speed oil engines. The spray photography equipment employed for these tests consists of a fuel injection system for producing an oil spray, an electrical spark system for illuminating the spray, and a photographic camera for recording its development. The fuel injection system contains a high-pressure hand pump for producing the injection pressures, an oil reservoir for maintaining the pressures of the fuel during the injection, a timing valve for timing the start of the oil spray, an injection valve for atomizing the oil, and a by-pass valve for controlling the cut-off of the spray. Additions were made to the apparatus in order to record the motion of the timing valve stem photographically. The timing valve stem was held against its seat by a helical spring so adjusted that the total hydraulic force on the stem actuated it immediately after it had