It may be suspended from the wall by placing wires around it, or it may stand upon legs. Perhaps a more convenient plan is to place it under the workbench in a similar position to a drawer. One precaution is necessary: when first heating the dryer, apply but a very gentle heat. This will prevent an accumulation of moisture, which would otherwise pass off in steam, coming in contact with the buff, thus causing a dampness. Another caution: never have the temperature of the air in the heater more than ten degrees above that which surrounds it.英文原著 · 《American Hand Book of the Daguerreotype》
Preparation.--This is easily accomplished by putting about two parts of hydrochloric (muriatic) acid on one of powdered black oxide of manganese, and heating it gradually in a flask or retort, to which may be adapted a bent glass tube. A yellowish-green gas is disengaged, which being conducted through the glass tube to the bottom of a bottle, can readily be collected, being much heavier than the air, displaces it completely and the bottle is filled (which can be seen by the green color); a greased stopper is tightly fitted to it, and another bottle may be substituted.英文原著 · 《American Hand Book of the Daguerreotype》
"Sometimes on heating the plate after washing, the surface is covered with spots or assumes a variegated appearance. This indicates that the solution is impure, or that the plate have not been thoroughly washed and are still contaminated with the soluble chlorides which are contained in the solution.英文原著 · 《American Hand Book of the Daguerreotype》
"On heating the plate, the brown coating of chloride melts into a translucent enamel, and the heat should be withdrawn when a cherry-red color is produced. It the heat is continued longer, the plate assumes a lighter color, and becomes less sensitive; and the enamel will finally scale off. To produce a picture by the ordinary process of M. Neipce, unaccelerated, it should be exposed for from three to five hours to sunlight in the camera, though pictures may be procured by contact, in from fifteen to thirty minutes."英文原著 · 《American Hand Book of the Daguerreotype》
One night in autumn a few men were gathered about a fire on the slope of a hill. They belonged to a small detachment of Confederate forces and were awaiting orders to march. Their gray uniforms were worn beyond the point of shabbiness. One of the men was heating something in a tin cup over the embers. Two were lying at full length a little distance away, while a fourth was trying to decipher a letter and had drawn close to the light. He had unfastened his collar and a good bit of his flannel shirt front.英文原著 · 《Awakening & Selected Short Stories》
So she tore them both up and put them in the little heating stove, and lighted a match and set them burning, and watched them until they withered down to gray ash, and then broke up the ashes and scattered them amongst the cinders. Marie, you must know, had learned a good many things, one of which was the unwisdom of whetting the curiosity of a curious woman.英文原著 · 《Cabin Fever》