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Vacuum Punmps.

J. B. Waring................., New York...... ................See Page 24
Valve Oll.
F. S. Pease.................. * * * Buffalo, N. Y..................See Page 100.
Valves.
A. Fulton's Son & Co..................... & 6 & 6 to to o so & ......Pittsburgh, Pa...............See Page 116
Crane Bros. Manufacturing Co........................Chicago, Ill.................... && 230
Geo. W. Richardson & Co.......... to e o 'o - © e o & © to to e o & ......Troy, N. Y...................... 46 50
J. D. West & Co.. - New York..................... o {{ 56
J. J. Walworth............................. ... .............Chicago, Ill.................... “ 124
Morris, Tasker & Co...................... • * * * ~ b & © e g is to o e s a Philadelphia, Pa.............. 4 & 36
R. A. Brick & Co.......................... * * * * * * * * * g o e o 'o e is New York...................... & 4 48
Vanes. -
J. D. West & Co New York See Page 56
... ." Varnish-
Edward Smith & Co......... & e g o os e g g g g o e - e - © a v or e o e o e s e g o a sNew York......................See Page 218
H. W. Johns...... * - & © to w e o 'o to e o s & d e o e o to e o e o 'o - - - - - - - to e o 6 to to e s e o e {{ “ ................. to o o - {{ 224
Jay & Cook..................... e to e e o se e o 'o e o e e e s to e o & © e o & © e o e g e £4. “ ..................... 46 234
J. W. Masury & Son...................................... & 4 “. ..................... {{ 214
Walentine & Co {{ 66 •eos • * * * * * * * * * * * * * * * * 6& 198

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Ventilators, Radley & McAlister Manufacturing Co............. New York...................... See Page 250 T. B. Bickerton & Co., Philadelphia, Pa.............. {{ 138 Vises. Champlin & Rogers....................... ... so to so so o so to e o 'o e o os e s woChicago, Ill.................... See Page 192 England & Bindley....................................... Pittsburgh, Pa............... { % 162 Hermann Boker & Co.................................... New York.............. See Pages 152, 154 J. J. Walworlh....... .......... e e o e o e o e to e e o so e o 'o to to to & to $ to e o o $ Chicago, Ill.................... See Page 124 Washers.

G. B. Walbridge............................................New York........... .......... See Page 130 Hoo es & Townsend....................................... Philadelphia, Pa............. “ 28 Lewis Oliver & Phillips; H. B. Newhall, Ag't...New York............. • * g e o is o o o {{ T66 Pittsburgh Bolt Co................ - e o e s to e e o e o e s e o 'o e o e s e e s e Pittsburgh, Pa................ {{ 118 Pratt & Co..................... # * * * * e o 'o o os e o s = o e o a s to s e e e ......Buffalo, N. Y.................. § { T32 Providence Tool Co.; H. B. Newhall, Agent....New York...................... { * 166 The Reading Bolt & Nut Works; H. B. New

hall, Agent............................. to $ to $ to o 'o e o so to o o { % “ ..................... {{ 166 Wm. Green & Co................. to e o 'o e o E to e o e o & © to e a to $ to t e o so go Wilmington, Del............. § { 248 Wm. Gilmor of Wm....................................... Baltimore, Md....... ........ 4 to 248 Wm. H. Haskell & Co.; H. B. Newhall, Ag't....New York...................... {{ 166

} SQUARES, CUBES, SQUARE ROOTS, AND CUBE Roots—Coretireued.

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Washing Machines.

D. Brewer & Co............................................. Philadelphia, Pa.............. See Page 246
Wastes
Phelps & Sanger........................................... Cleveland, Ohio............... See Page 120
SAW-MILL.

Gang Saw, 30 square feet of dry oak, or 45 square feet of dry pine, per hour, requires 1 horse-power. Circular Saw, 2.5 feet in diameter, 270 revolutions per minute, 40 square feet of oak, or 70 of dry spruce, requires 1 horse-power. 300 revolutions per minute. 1.33 square feet of dry pine per minute, kerf 7–32 inch and 6 inches deep, requires the power of 1 horse for the saw alone; and 1 square feet, kerf 34 inch and 1 foot in depth, requires a like power. 4.5 feet in diameter, kerf 34, and 1 foot in depth, requires 1 horse-power for 1.33 feet per minute. Oak requires nearly one-half more power than pine. With a kerf of 3% inch, 1 horse-power will saw 2.66 square feet per minute. The speed of the periphery should be about 50 feet per minute.

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