Hunting Crop

"Ha! Our party is complete," said Holmes, buttoning up his pea-jacket and taking his heavy hunting crop from the rack.
(Andventure II, pg 29)

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Artificial knee-caps

"I started off, Mr. Holmes, but when I got to that address it was a manufactory of artificial knee-caps, and no one in it had ever heard of either Mr. William Morris or Mr. Duncan Ross."

(Adventure II, pg. 26)

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Encyclopaedia Britannica

"Is to copy out the "Encyclopaedia Britannica." There is the first volume of it in that press. You must find your own ink, pens, and blotting-paper, but we provide this table and chair. Will you be ready to-morrow?"

(Adventure II, pg 24)

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Camera

"Oh, he has his faults, too," said Mr. Wilson. "Never was such a fellow for photography. Snapping away with a camera when he ought ot be imporving his mind, [...]

(Adventure II, pg 21)

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History of the camera

Breastpin

", [...] rather against the strick rules of your order, you use an arc-and-compass breastpin."
(Adventure II, pg. 20)

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Albert Chain

"[..] He wore rather baggy grey shepherd's check trousers, a not oven-clean black frock-coat, unbottoned in the front, and a drab waistcoat with a heavy brassy Albert chain, and a square pierced bit [...]"
(Adventure II, pg. 20)

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Flight

"We shall see." He pushed past the servant and rushed into the drawing-room, followed by the King and myself. The furniture was scattered about in every direction, with dismantled shelves and open drawers, as if the lady had hurriedly ransacked them before her flight. 

(Aventure I, A SCANDAL IN BOHEMIA pg. 17)

Wright's Brothers glider making turn in one of the first sustained and controlled flights in 1902.


Before the invention of the airplane, the zeppelin was the only way of air transportation in the 1900s.

Link --> History of aviation - Wikipedia

Image source --> Wright glider turns
Image source --> Zeppelin