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.
CHAPTER V
MAGIC LANTERN WITH PETROLEUM LAMP; VERTICAL
AND REFLEX MANTLE GAS LAMPS; ACETYLENE
LAMP; ALCOHOL LAMP WITH MANTLE
§ 190. Apparatus and Material for Chapter V:
Suitable projection room with screen ; Magic lantern with lamp and chimney for petroleum (fig. 65-67); High grade petroleum for burning in the lamp; Gas burners for vertical and reflex mantles (fig. 68-69); Illuminating gas supply; Acetylene burner and reflector, (fig. 70) ; Acetylene gas supply (house supply, prestolite tank of compressed acetylene in acetone or an acetylene generator) ; Special alcohol lamp with mantle (fig. 72-73); Strong alcohol (95%) ethyl, methyl or denatured. The magic lantern for all but the oil lamp must have a lamp-house into which the burner can be placed. There must be lantern slides, screw drivers, pliers and matches or safety lighters (§ 160), for all of them.
§ 191. Historical development and references to literature.—
For the history see the Appendix, and for general works of reference see the list of books in the first chapter (§2).
The directions sent out by the manufacturers of these light sources should be studied carefully and followed exactly unless one has technical knowledge on the subject.
OIL AND GAS LAMPS
§ 192. Early sources of light. — For a long time after the invention of projection apparatus there were but two sources of light known :
(1) The sun, which has ever remained the most brilliant source of light available, and
(2) Some form of torch, candle, or oil lamp.
The first oil lamps burned animal or vegetable oil and had no lamp chimney.
After the discovery and proper refinement of petroleum, that became and has remained the oil most used for illumination.
If one reads the early works on projection it seems astonishing that the workers of those times were able to produce screen images
119