6131. Sizes of Drawing Paper

6131. Sizes of Drawing Paper.

"Wove Antique..................52 X31 in.

Uncle Sam.....................48 X 20 in.

Double Elephant................40 X26 in.

Emperor.......................40 X60 in.

Atlas...........................32 X26 in.

Colombier.......................33 3/4 X 23 in.

Elephant.......................27 3/4 X 23 1/4 in.

Imperial........................29 X 21 1/4 in.

Super Royol....................27 Xl9 in.

Royal..........................24 X19 in.

Medium........................22 Xl8 in.

Demy...........................19 Xl5Ģin.

Cap............................13 X l6 in.

6132. Barometrical Rules for Prognosticating the Weather

6132. Barometrical Rules for Prognosticating the Weather. I. After a continuance of dry weather, if the barometer begins to fall slowly and steadily, rain will certainly ensue; but if the fine weather has been of long duration, the mercury may fall for 2 or 3 days before any perceptible change takes place, and the longer time that elapses before rain comes, the longer the wet weather is likely to last.

II. Conversely, if, after a great deal of wet weather, with the barometer below its mean height, the mercury begins to rise steadily and slowly, fine weather will come, though 2 or 3 wet days may first elapse ; and the fine weather will be the more permanent, in proportion to the length of time that passes before the perceptible change takes place.

III.    On either of the two foregoing suppositions, if the change immediately ensues on the motion of the mercury, the change -will not be permanent.

IV.     If the barometer rises slowly and steadily for two days together, or more, fine weather will come, though for those two days it may rain incessantly, and the reverse; but if the barometer rises for two days or more during rain, and then, on the appearance of fine weather, begins to fall again, the fine weather will be very transient, and vice versa.

V.    A sudden fall of the barometer in spring or autumn indicates wind; in summer, during very hot weather, a thunder-storm may be expected; in winter, a sudden fall after frost of some continuance indicates a change of wind with thaw and rain; but in a continued frost a rise of the mercury indicates approaching snow.

VI. No rapid fluctuations of the barometer are to be interpreted as indicating either dry or wet weather of any continuance; it is only the slow, steady, and continued rise or fall, that is to be attended to in this respect.

VII. A rise of the mercury late in the autumn, after a long continuance of wet and windy weather, generally indicates a change of wind to the northern quarters, and the approach of frost.

6133. Melting or Boiling Point of Metals, Liquids, etc.

6133. Melting or Boiling Point of Metals, Liquids, etc..

Degrees Fahr.

3080° Platinum melts.

2786 Cast iron melts; 2696° (Morveau).

2500 Steel melts.

2016 Gold melts (Daniell); 2200° (Kane).

1996 Copper melts (Kane); 2548° (Daniell).

1873 Silver melts (Makins); 2233° (Daniell).

1869 Brass melts (Daniell).

1000 Iron, bright cherry red (Poillet).

980 Iron, red heat (Daniell).

914 Zinc burns (Daniell).

810 Antimony melts.

773 Zinc melts (Daniell); 793° (Gmelin).

644 Mercury boils (Daniell); 662°( Graham).

630 Whale oil boils (Graham).

612 Lead melts (Crighton); 609° (Daniell).

600 Linseed oil boils.

560 Sulphur ignites.

545 Sulphuric acid boils (Phillips); 620° (Graham).

476 Bismuth melts(Phillips);518°( Gmelin).

442 Tin melts.

380 Arsenious acid volatilizes.

372 Saturated solution of nitrate of ammonia boils.

356 Metallic arsenic sublimes.

336 Saturated solution of acetate of potassa boils.

320 Cane sugar melts, 320° to 400°, baking heat of an oven.

315 Oil of turpentine boils (Kane).

304 Saturated solution of nitrate of lime boils.

302 Etherification ends.

275 Saturated solution of carbonate of potash boils.

256 Saturated solution of acetate of soda boils.

248 Nitric acid, specific gravity 1.42, boils.

238 Saturated solution of nitre boils.

236° Saturated solution of sal-ammoniac boils. 226 Sulphur melts (Fownes); 232° ( Turner). 220 Saturated solution of alum, carbonate of soda, and sulphate of zinc boils. 218 Saturated solution of chloride of potassa boils. 216 Saturated solution of sulphate of iron, sulphate of copper, and nitrate of lead boils. 213 Water begins to boil in glass (or 2131/2°). 212 Water boils in metal, barometer at 30 inches. 199 Milk boils. 194 Sodium melts.

185 Nitric acid, specific gravity 1.52, boils. 180 Starch dissolves in water. 176 Rectified spirit boils. Benzole distills. 173 Alcohol, specific gravity 796 to 800, boils. 151 Bees'-wax melts (Kane); 142° (Lepage). 150 Scalding heat. Pyroxylic spirit boils

(Scanlan). 145 Albumen coagulates. 140 Chloroform and ammonia, specific gravity .945, boils. 136 Potassium melts (Daniell). 132 Acetone (pyroaceticspirit) boils(Kane). 130 Butter melts (130° to 140°). 122 Mutton suet and styracine melts. 120 Phosphorus inflames. Friction matches ignite. 116 Bisulphuret of carbon boils (Graham). 112 Spermaceti and stearine melt. Ill Beef tallow melts. 110 Highest temperature of the human body (in lockjaw). 106 Mutton tallow melts. 99 Phosphorus melts (99° to 100°). 98 Ether, specific gravity .720, boils.

Blood heat. 88 Acetous fermentation ceases. Water boils in a vacuum. 81 Mean temperature at the equator. 77 Vinous fermentation ends; acetous begins. 67 Lowest temperature of the human body (in cholera). 65 Best temperature of a room (65° to 68). 62 Oil of anise liquefies; congeals at 60°. 60 Mean temperature at Rome. 507/10Mean temperature at London. 42 Sulphuric acid, specific gravity 1.741, congeals (41° to 42°). 41 Mean temperature of Edinburgh. 36 Olive oil freezes. 32 Water freezes. 30 Milk freezes. 28 Vinegar freezes. 20 Strong wine freezes.

—  4 Mixture of snow and salt.

—  7 Brandy freezes.

—39 Mercurv freezes (30° to 40°). (See also No's. 7,3353, 3459 and 1687, etc.).