Wilson's quarter century in photography : a collection of hints on practical photography which form a complete text-book of the art . gainst the bottom ofthe bottle, and its ends firmly soldered to the sides of the can. The object of this strip is to hold the bottle down securely when the can is full ofwater. The space between the tin neck of the can and the neck of the bottle was thenfilled with plaster-of-Paris cement, rendering it water-tight. I then took a piece of glass tube about eighteen inches long, and six inches from oneend I made a right-angled bend, by holding the tube in the flame
Wilson's quarter century in photography : a collection of hints on practical photography which form a complete text-book of the art . gainst the bottom ofthe bottle, and its ends firmly soldered to the sides of the can. The object of this strip is to hold the bottle down securely when the can is full ofwater. The space between the tin neck of the can and the neck of the bottle was thenfilled with plaster-of-Paris cement, rendering it water-tight. I then took a piece of glass tube about eighteen inches long, and six inches from oneend I made a right-angled bend, by holding the tube in the flame of a spirit-lamp untilheated sufficiently to bend. The can was then set upright on a suitable support, which,of course, placed the bottle inside of it inverted, with its neck protruding downwardsthrough the bottom of the can. The can was then filled with cold water. 246 Wilsons quarter century in photography. There are many methods iu use for obtaining pure water. For some pur-poses it may be rendered so by easy chemical means, while for others it must bedistilled or boiled. The means will be explained as we proceed. Fig. The short arm of the glass tube was then placed upward through the neck of thebottle, fitting loosely, and the other end of the tube was placed in the spout of a boiling tea-kettle, the joint between the spout and tubebeing wound with a strip of muslin, to renderit nearly steam-tight. The steam from the tea-kettle now passed through the glass tube upinto the bottle, and coming against the coldsides of the bottle was condensed, and randown out of the neck of the bottle into a glassdish placed below to receive it. The condensed steam coming only in contactwith glass surfaces produces water absolutelypure, provided the manij^ulation is intelligentlyand carefully conducted. The accompanying rough diagram will givea general idea of the construction of the appa-ratus. A is the bottle, B the tin can, C the bent glass tube, and D the spout of the tea-kettle.—
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Keywords: ., bookcentury1800, bookdecade1880, bookidwilsonsquart, bookyear1887
