We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
34 McIntosh battery and optical co., Chicago, ill., u. s. a. identically the same ratio of proportion that you diminish the in- tensity of the brilliancy of illumination, or technically speaking, the candle power of one lantern ; in an exactly corresponding propor- tion you increase the incandescence in the other lantern. This regulating of the supply and establishing the equilibrium of the gases can be made hours before the entertainment, so that when the time to light up comes, all that is necessary to do is to turn on a full head of gas at the cylinders and touch a match to the jet, and you are at once ready for exhibition without further adjust- ment. PRICE complete with High Pressure Hose and Couplings $50.00 McIntosh double needle valve. PRICE $6.00 All of our cylinders are furnished with the McIntosh Double Needle Valve in place of the old style of Single Needle Valves. The threads on these valves being of standard size can be read- ily attached to nearly every make of cylinders. There being two needles, the establishing of the equilibrium of the gases is very easily accomplished. The Valve that has the wheel attachment being the fine adjustment, and the spindle in top of valve regulating supply from cylinder. In turning on gas see that the wheel valve is closed tightly; open the spindle one full turn, or turn on as much as is necessary, allowing the gas to come out on to the wheel needle valve ; now with this latter valve establish the equilibrium, then, as the pressure goes down in the cylinders, all that is necessary to do is to open up the spindle of valve. In this way you can connect hours before your entertainment, and when ready to commence projecting, all you have to do is to open the main valve and light up, the adjust- ment already being controlled by the wheel valve.