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These patents are between fifty and sixty in number, and include magnetic ore separators of ten distinct types; also breaking, crushing, and grinding rolls, conveyors, dust-proof bearings, screens, driers, mixers, bricking apparatus and machines, ovens, and processes of various kinds.
In the same list will also be found a large number of Edison's patents on apparatus and methods of screening, drying, mixing, and briquetting, as well as for dust-proof bearings, and various types and groupings of separators, all of which were called forth by the exigencies and magnitude of his great undertaking, and without which he could not possibly have attained the successful physical results that crowned his labors.
The windows of the house will be dust-proof, fly-, mosquito-, and moth-proof; the air supplied will be strained by galleries of screens, if indeed social advance has not eliminated soot from chimneys and grit from the streets. Most certainly dirt will not be permitted to come in on shoes and long dresses. Warmed or cooled, moistened or dried air will be circulated as needed.
"Our clothes are down under the water in the car, darlin'," Jane informed her. "Of course, they are soaked," reflected Miss Elting. "I do not think so. The chest on the back of the car is water-proof as well as dust-proof," said Jane. "If it weren't water-proof the things in it would get soaked every time there was a driving rainstorm. No; our other clothing is as dry as toast.
It will thus be seen that a number of slivers, each having been drawn out according to the degree of draft, are ultimately joined to pass through a common sliver guide or conductor to the nip of the delivery rollers, and thence into a sliver can. With the exception of the driving pulleys, all the gear wheels are at the far end of the frame, and totally enclosed in dust-proof casing.
His eyes were at once attracted by the bowl of restless fluid on the table. "What's that?" he asked. Roger Seaton smiled enigmatically. "Only a trifle" he answered "Just health! It's a sort of talisman; germ-proof, dust-proof, disease-proof! No microbe of mischief, however infinitesimal, can exist near it, and a few drops, taken into the system, revivify the whole."
The following instruments were also carried: Three minimum registering thermometers; one aneroid barometer which was tested and set for me by the United States Weather Bureau; one clinometer; one pocket transit; three compasses; one pedometer; one taffrail log; one pair binoculars; three No. 3A folding pocket Kodaks, sixty rolls of films, each roll sealed in a tin can and waterproofed, and six "Vanguard" watches mounted in dust-proof cases.
The drawing-room was a bare, inhospitable room, studded here and there with uncomfortable looking early Victorian armchairs swathed in dust-proof cloths. A fire was making an unsuccessful attempt to burn in the open grate. Nur-el-Din turned as he entered the room. She was wearing a gray cloth tailor-made with a white silk, blouse and a short skirt showing a pair of very natty brown boots.
There was a gown-room, made dust-proof, of polished hardwood, and with tier upon tier of long poles running across, and padded skirt-supporters hanging from them. Everywhere there was order and system each skirt was numbered, and in a chiffonier-drawer of the same number you would find the waist and so on with hats and stockings and gloves and shoes and parasols.
Luck, when that storm broke, was worried over his negative drying in the garret, until he had hurried up the ladder to see what might be done. He had found the film practically dry, and had carried it down in much relief to his dark room which, being light-proof, was also practically dust-proof. There had been other vexations, but there had been fine, clear days as well.