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MECHANIC'S, MACHINIST'S, AND ENGINE:
OXTAINING TABLES AND FORMULE FOR USE IN SUPERFICIAL AXD SOLID
CHEMISTRY AND ISCELLANEOUS RECIPES.
CONTAINING FORMULE FOR TIIE VARIOUS METHODS OF RUNNING AND CHANGING
LINES, LOCATING SIDE TRACKS AND SWITCHES, &C., &c.
NATURAL SINES AND TANGENTS TO EVERY DEGREE
AND MINUTE OF THE QUADRANT,
LOGARITUS OF NATURAL NUMLETS Frou 1 TO 10,000.
BY CILARLES HASI ETT,
EDITED BY CHARLES W. HAC KLET,
Professor of Mathematics in Columbia College,
ES G. G R E O
No more useful little works have ever been presented to the public than the various pocket companions of a character analogous to that here offered. These have been a good deal, though not yet too much, multiplied of late;. and where the formulas, rules, and tables which they contain have been skilfully framed under the guidance of scientific men, they have afforded to the Practical En. gineer, Architect, and Mechanic, the most welcome aid in the constructions and computations which make part of their daily ohren pation, and which, without the ever-at-hand suggestions and directions of these unpretending little servants, might consume hours and days in the turning over of large volumes, or in painful inrestigations based on general principles of science where the individual happened to be competent to conduct them.
The wants to be snpplied in such a work are discovered by experience and observation in the different callings for which they are pore especially intended. That these wants have not all been met in the works of a similar kind which have already appeared will be rude erident by a simple inspection of the amount and variety or Let matter contained in the present volume.
L is not every one, however practically expert he may be. Az pursuit, that is capable « arranging and digesting in
ELLER the knowledge tessary for his own 25 W?" } last been years in acquiring, so as to rel 2 available for
of others Such i task, to be well performed, requires combinatis vf rent i qualities not always, perhaps not often, found in t' ime individual.
happy concurrence of circumstances has by aceident secured for the composition of the present work the labors of several skilful hands, both as compilers from the best foreign sources, and as original producers of valuable material never before in print. The result of so much well directed industry is the rich collection, not a line of which is not invaluable, which, in the aptest form for imme. diate ușe, has been crowded into the space of a single small volume.
Steam and its application play so important'a part in the "economy of life at the present day, that the most useful practical rules and formulas for all the ordinary cases occurring, cannot with propriety be omitted in a work of this kind. A due 'attention will be found to have been paid to the matter, and some of the newest modes of managing in steam supplied with the means of the r
e requisite computation
The laying out of Railroad curves is one of the most important and at the same time laborious and troublesome duties which the Civil Engineer has to perform: So much of this occurring on every line of Railroad, any, however slight, improvement of method' which may serve to facilitate or lessen the labor of this process is a real boon to that large and eminently useful and accomplished body of men to whom the supervision of such operations is committed.
1ec of the more common trigonometric functions, to wit, sines,
adapted to the peculiar problems which are presented in
ist additional facility, which would be much increased