6. 2 inches.
7. 3 inches. Focal length, 17 inches. Maker, Ross.
I would also suggest that the character of the object copied should be included in the above table. My answer supposes a light-coloured building, of an ordinary sandstone colour. A view comprising foliage would require a much longer time for its full development. In working on the sea-coast, I find that the dark slate rocks of north Cornwall require an exposure in the camera half as long again as the blue mountain limestone cliffs of South Wales, which abound in actinic power.
J. D. Llewelyn.
Pen-ller-gaer.
Replies to Minor Queries.
Turkish Language (Vol. ix., p. 352.).—Your correspondent Hassan, who would much gratify our friends the Turks if he would spell his signature with one s only, will find the object of his inquiry in a little book just published by Clowes, Military Publisher, Charing Cross, Turkish and English Words and Phrases, for the Use of the British Army and Navy in the East, price 1s. The pronunciation is given in the Roman character, and according to the plainest English rules.
Osmanli.
Dr. Edward Daniel Clarke's Charts of the Black Sea (Vol. ix., p. 132.).—A reply respecting these important Charts, and their value, was given by the First Lord of the Admiralty in the House of Commons on March 6, in consequence of an inquiry made by Mr. French. Sir James Graham