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Anil Rajyaguru

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last 3 solved tasks
There are 6 words hidden in the picture, can you find 1 of 6?
Which number should replace the question mark? Author: Sumbul Azeem
Can you find out how many matches are placed in the picture?

Tintype patent

In 1856, the first U.S. patent for the tintype photographic picture process was issued to Professor Hamilton L. Smith of Gambier, Ohio (No. 14,300), "For the Use of Japanned Metallic Plates in Photography" to obtain "positive impressions upon a japanned surface previously prepared upon an iron or other metallic plate or sheets; and it consists in the use of collodion and a solution of a salt of silver and an ordinary camera." The patent described the preparation of the black varnish, and its application and baking as the japanned surface. Smith had described the chemical developing and fixing process in a previous patent application. Despite the popular "tintype" name, tin was not used. It referred to the thin metallic form of the iron backing.«

How do they figure o...

“How do they figure out the price of hammers? Per pound.”

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