Effect of colour on warmth of clothing.--Dark colours become hotter than light colours in the sunshine, but they are not hotter under any other circumstances. Consequently a person who aims at equable temperature, should wear light colours. Light colours are far the best for sporting purposes, as they are usually much less conspicuous than black or rifle-green. Almost all wild beasts are tawny or fawn-coloured, or tabby, or of some nondescript hue and pattern: if an animal were born with a more decided colour, he would soon perish for want of ability to conceal himself.
Warmth of different Materials.--"The indefatigable Rumford made an elaborate series of experiments on the conductivity of the substances used in clothing. His method was this:--A mercurial thermometer was suspended in the axis of a cylindrical glass tube ending with a globe, in such a manner that the centre of the bulb of the thermometer occupied the centre of the globe; the space between the internal surface of the globe and the bulb was filled with the substance whose conductive power was to be determined; the instrument was then heated in boiling water, and afterwards, being plunged into a freezing mixture of pounded ice and salt, the times of cooling down 136 degrees Fahr. were noted. They are recorded in the following table:--
Surrounded with Seconds.
Twisted silk.................................. 917
Fine lint..................................... 1032
Cotton wool.................................. 1046
Sheep's wool.................................. 1118
Taffety....................................... 1169
Raw silk...................................... 1264
Beaver's fur.................................. 1296
Eider down.................................... 1305
Hare's fur.................................... 1312
Wood ashes.................................... 927
Charcoal...................................... 937
Lamp-black.................................... 1117
Among the substances here examined, hare's fur offered the greatest impediment to the transmission of the heat. The transmission of heat is powerfully influenced by the mechanical state of the body through which it passes. The raw and twisted silk of Rumford's table illustrate this" (Prof. Tyndall on Heat.)
Waterproof Cloth.--Cloth is made partly waterproof by rubbing soap-suds into it (on the wrong side), and working them well in: and when dry, doing the same with a solution of alum; the soap is by this means decomposed, and the oily part of it distributed among the fibres of the cloth. (See "Tarpaulins.")
Incombustible Stuffs.--I extract the following paragraph from a newspaper. Persons who make much use of musquito curtains, will be glad to read it. "The Répertoire de Chimie Pure et Appliquee publishes the following remarks by the celebrated chemists, MM. D¦bereiner and Oesner, on the various methods for rendering stuffs incombustible, or at least less inflammable than they naturally are. The substances employed for this purpose are borax, alum, soluble glass, and phosphate of ammonia. For wood and common stuffs, any one of these salts will do; but fine and light tissues, which are just those most liable to catching fire, cannot be treated in the same way. Borax renders fine textile fabrics stiff; it causes dust, and will swell out under the smoothing-iron; so does alum, beside weakening the fibres of the stuff, so as to make it tear easily. Soluble glass both stiffens and weakens the stuff, depriving it both of elasticity and tenacity. Phosphate of ammonia alone has none of these inconveniences. It may be mixed with a certain quantity of sal-ammoniac, and then introduced into the starch prepared for stiffening the linen; or else it may be dissolved in 20 parts of water, in weight, to one of phosphate, and the stuff steeped into the solution, then allowed to dry, and ironed as usual.
Phosphate of ammonia is cheap enough to allow of its introduction into common use, so that it may be employed at each wash. Phosphate of ammonia is obtained by saturating the biphosphate of lime with liquid ammonia.
Sewing Materials.--An outfit of sewing materials consists of needles and thread; scissors; tailor's thimble; wax; canvas needles, including the smaller sizes which are identical with glove needles and are used for sewing leather; twine; a palm; awls for cobbling, both straight and curved; cobbler's wax; and, possibly, bristles. The needles and awls in use are conveniently carried in some kind of metal tube, with wads of cork at either end, to preserve their points. (See also the chapter on "Thread, for stitches," etc.)
Articles of Dress.--Hats and Caps.--There is no perfect head-dress; but I notice that old travellers in both hot and temperate countries have generally adopted a scanty "wide-awake." Mr. Oswell, the South African sportsman and traveller, used for years, and strongly recommended to me, a brimless hat of fine Panama grass, which he had sewn as a lining to an ordinary wide-awake. I regret I have had no opportunity of trying this combination, but can easily believe that the touch of the cool, smooth grass, to the wet brow, would be more agreeable than that of any other material. I need hardly mention Pith hats (to be bought under the Opera Colonnade, Pall Mall), Indian topees, and English hunting-caps, as having severally many merits. A muslin turban twisted into a rope and rolled round the hat is a common plan to keep the sun from the head and spine: it can also be used as a rope on an emergency.
Coat.--In nine cases out of ten, a strong but not too thick tweed coat is the best for rough work. In a very thorny country, a leather coat is almost essential. A blouse, cut short so as to clear the saddle, is neat, cool, and easy, whether as a riding or walking costume. Generally speaking, the traveller will chiefly spend his life in his shirt-sleeves, and will only use his coat when he wants extra warmth.