Railroad Track Scales.

Buffalo Scale Company.......... & © to * g o e o os o is g g g g g g & .....Buffalo, N. Y.................. See Page 40
Jones Scale Works Binghamton, N. Y......... ... “ 92
Rails,
Chas. W. Matthews s ...Philadelphia, Pa............ See Page 38
Greene & Randolph....................................... New York...................... $6 54
Jones & Laughlins Pittsburgh, Pa.............. & $f 32
Jno. W. Quincy ......New York...................... $6 178
Miller & Smith ... to e e o e g o os e o e o 'o { % “ ..................... “ 112
O. W. Child...... ... “ “. ..................... “ . 262
Tyng & Co * G is to e o e o e o e ... “ “ ..................... “ 260
Wose, Dinsmore & Co..................................... $6 “. ..................... {{ 60
Railway Brakes.
Ward Air Brake Co Ral , Mich See Page 56
ge Ratchets.
Barwick Wrench Co Boston, Mass See Page 60
Rearmers. -
Champlin & Rogers Chicago, Ill............... ....See Page 192
- Red Lead. • 3.
Atlantic White Lead Co.—Rob't Colgate & Co. New York............See Pages 238, 240
Brooklyn White Lead Co “ “ ..........•---------- See Page 268
T. B. Bickerton & Co...... Philadelphia, Pa.............. “ 13;
Wetherill & Bro Philadelphia, Pa..............* 6& 52
Reflectors.
Radley & McAlister Manufacturing Co...... ..... New York . See Page 250
Wose, Dinsmore & Co ...... “ “. ..................... $6 6 y
Retorts. - - -
Philip Neukumet..........................................Philadelphia, Pa............ See Page 104
Maurer & Weber.............. New York...................... $6 228
Riddles.
Van Tuyl Mauufacturing Co........................... New York...................... See Page 242
- Rivet Harmners.
Hermann Boker & Co ...New York............ ..See Pages 152, 154
Nelson Tool Works..................... “ “ ...................... See Page 30
Rivet Makers.
Hoopes & Townsend......................................Philadelphia, Pa............ See Page 28
J. T. Ryerson Chicago, Ill........... ........ {{ 180
Pittsburgh Bolt Co Pittsburgh, Pa............... {{ 118
Providence Tool Co.; H. B. Newhall, Agent....New York......... .............. {{ 16.3

ROOFING SLATE. General Rule for the Computation of Slate. (Furnished by the Penrhyn Slate Co.) From the length of the Slate take three inches, or as many as the third covers the first; divide the remainder by 2, and multiply the quotient by the width of the slate, and the product will Le the number of square inches in a single slate. Divide the number of square inch s thus procured by 144, the number of square inches in square foot, and the quotient will be the number of feet and inc es required. A square of slate is what will cover 100 feet square, when properly laid upon the roof.

TABLE OF SIZEs AND NUMBER of SLATE IN ONE SQUARE.

THE WEIGHT of a Square of Slate is estimated in a general way (varying according to the thickness of the different makes), at from 600 to 700 lbs. per square.

Rivets, - . . Bickford, Curtiss & Deming............. & e o e o e o e o e e o e a Buffalo, N. Y............ ......See Page 136 D. Brewer & Co............................................. Philadelphia, Pa............. { % 246 N. H. Gardner & Co............................... to $ to to et p is Buffalo, N. Y.................. {{ 254 Wm. Green & Co.......................................... Wilmington, Del............ “ 248 See also, Rivet Makers. - Riveting Machines. Wm. Sellers & Co................... e e s e e s a se e o e o os e o e e s e e s a Philadelphia, Pa............. See Page 64

Rods–Measuring. F. Eckel.......................................... New York See Page 76 ' ' '. Rolling Mill Castings. Bowlers, Maher & Brayton............................. Cleveland, Ohio.............. See Page 42 Rolling Mill Machinery. . Phelps & Sanger * go to to e & Cleveland, Ohio...... .. ......See Page 120 Roofing Materials. . H. W. Johns New York....... ...............See Page 224 Roofing Plates. Tyng & Co.................................................... New York.............. ‘e e o 'o e o o o See Page 260

LOCKS AND PADI,00KS.
STANDARD SIZEs.
(Furnished by Romer do Co.) .

BRASS SPRING PADLOCKS.

1 inch Spring Padlock, no Drop. $6 $6 {{

Lock, spring drop and chain. 2% inch heavy Spring Padlock, spring drop, no chain. 2% inch Spring Padlock, spring drop, no chain. 2% inch heavy R. R. Car Lock, spring drop and chain. 3 inch heavy R. R. Car Lock, spring drop and chain. 3 inch heavy, 3 tumbler R. R. Car Lock and chain. 3 inch heavy 3 tumbler Store Door Padlock, spring drop, no chain. 2% inch R. R. Switch and Car Lock, spring drop and chain. 2% inch 3 tumbler, Spring Lock, spring drop, no chain. 2% inch 3 tumbler, Spring Lock, spring drop, no chain. 2% inch R. R. Freight Car Tumbler Lock, spring drop and chain.

A. L. HALE obro.

Wholesale and IERetail

Furniture Dealers,

Furniture Lealers,

10, 12, 14 as 16 GANAL STREET,
CHICAGO, ILLINOIS,

Boy" We have the largest and best stock of Furniture in the West,
and make a specialty of

FOR RAILROAD, CAR AND AGRICULTURAL SHOPS.
SU P E R I O R T O A N Y I N U S E.

J. A. FAY & CO., GINCINNATI, OHIO.

Roofing Slates. - -

Penrhyn Slate Co............... e e e o e o os o o se e o 'o e o e s o e s e o e e ..Buffalo, N. Y.......... to & to $ to e o 'o See Page 202
Ropes.
De Grauw, Aymar & Co......... ...................... New York............... do o os e e o e See Page 112
T. B. Bickerton & Co Philadelphia, Pa............ “ 138
- Rubber Belting, Hose, &c.
A. Carr.........................................................New York........ to £ is to o e o 'o e o te e o e See Page 244
A. Fulton's Son & Co........ to go to e o o os e is e e s to t e o so e o 'o o o e o 'o & © ..Pittsburgh, Pa.............. * 66 116
Crane Bros. Manufacturing Co........................Chicago, Ill............... * * * * * “. . 230
Goodyear's I. R. G. Manufacturing Co............New York............... * * * * * * * * {{ 252
J. J. Walworth............................................ .Chicago, Ill.......... e e o e s is a e i s a $6 124
New York Rubber Co........... & e e s e s e e s e e o a s• - - - - - - - ..New York................... e a to {{ 260
Phelps & Sanger.................. ........................Cleveland, Ohio............... 6% 120
Radley & McAlister Manufacturiug Co......... ...New York...................... & & 250
Wose, Dinsmore & Co.......................... ........... “ “. ........ ‘............ {{ 60
Rubber Coods.
Goodyear's I. R. G. Manufacturing Co...... ......New York...................... See Page 252
L. G. Tillotson & Co { % “ ..................... {{ 94
New York Rubber Co...................... to E to o to t t e o e o O & to {{ “ ..................... {{ 260
Phelps & Sanger...................................... ......Cleveland, Ohio.............. “ 120
Rubber Springs. .
Chicago Spring Works...................................Chicago, Ill.................... See Page 200
Goodyear's I. R. G. Manufacturing Co............. New York............. to o so to $ to £ to $ { % 252
Greene & Randolph....................................... { % “ ............... ----. & C 54
L. G. Tillotson & Co {{ “ ..................... 6 & 94
New York Rubber Co.................................... {{ “ ..................... {{ 260
Radley & McAlister Manufacturing Co............ € $ “. ................ * * * * * { % 250
Wose, Dinsmore & Co................ * e o e o os e o & to e o e e o e s is o e o { % “ ............... & o $ to a to { % 60
- Safes.
W. A. Dobinson & Co Buffalo, N. Y........ to & 6 p & © to to so o See Page 196
Warren, Johnson & Co . “ ....... * * is o 'o e o go & & & & © e o os { % T00
Safety Fuse.
F. M. Alford................ * e e g o e o e o e o a go to e o is e to to t e o 'o & e o e o 'o - to e is Avon, Coan.................... See Page 158
Geo. W. Mowbray - North Adams, Mass......... {{ 182
Laflin & Rand Powder Co.............................. New York..................... See Last Page
- Safety Vasves.
Geo. W. Richardson & Co Troy, N. Y.................... ..See Page 50
Posts & Kalkman......................................... New York............. to o to G o $ to to o “ 266
Sandpaper, &c. -
England & Bindley......... Pittsburgh, Pa......... ......See Page 162
. Sash and Blind Machinery.
C. B. Rogers & Co e e o e o e e o e s e o 'o e o 'o e & New York.............. ....... See Page 210
Sashes, Doors, &c.
Joseph Churchyard Buffalo, N. Y.................. See Page 160

WOOD-WORKING MACHINERY.

Velocity of circular-saw at periphery, 6,000 to 7,000 feet per minute. ${ the band-saw, 2,500 feet per minute.

£ 6 gang-saws, 20-inch stroke, 120 strokes a minute. {{ scroll-saws, 300 strokes per minute. - {{ planing-machine cutters at periphery, 4,000 to 6,000 feet per minute. Travel of work under planing-machine, 1-20th of an inch for each cut. $6 planing-machine cutters, 3,500 to 4,000 feet per minute.

£6. squaring-up-machine cutters, 7,000 to 8,000 feet per minute. Speed of wood-carving drills, 5,000 revolutions per minute.

“ machine augers, 1% inch diameter, 900 revolutions per minute.

“ machine augers, 34 inch diameter, 1,200 revolutions per minute. Gang-saws require for 45 super. feet of pine per hour, 1 HP indicated. Circular-saws require for 75 super. feet of pine per hour, 1 HP indicated. In oak or hard wood, 34ths of the above quantity require 1 HP indicated.

LEATHER GLUE.

A substance known as “leather glue” is prepared by mixing ten parts of sulphide of carbon with one of oil of turpentine, and adding enough gutta-percha to thicken the mass. The leather surfaces to be united must be freed from oil, which is accomplished by subjecting them to pressure by laying the leather upon blotting paper and applying a hot iron. After tracking together the edges to be joined with the cement, they are to be kept under pressure until the glue is entirely dry.