The Optical Magic Lantern Journal (January 1893)

) Barnes, of New York, and Mr. H. Snowden Ward, of London. We understand that Mr. Ward (editor of ‘ Practical Photographer ”’) starts for New York July 1st, and that the honeymoon will be spent in Chicago. 7 * # Mr. Hvucues, of Kingsland, is at present engaged on a book, which will shortly be published. The subject is, ‘‘ How to Choose, What to Avoid, and How to Use Lanterns.” * * e We learn that Cheflin’s Fantoccini slides, | described in our issuc of April, 1891, are now. being manufactured and introduced by Messrs. Ottway and Son, of Islington. * * Av a recent lantern entertainment at West minster the show came to a somewhat abrupt | close. The rev. lecturer had just said, “I will now show you, my boys, what Robinson Crusoe’s disobedience brought about’’—when | by some unexplained means the lantern was toppled over, and fell from its stand to the fioor. The gas connections being broken, the gas escaping from the cylinder made a noise that somewhat frightened the juvenile audience ; but lights were obtained, and peace speedily restored. 3? * * Tue offices of our contemporary Pacific Coast Photographer (San Francisco) shave been removed from 27, Main Street, to 108, Sacraniento Street. * 2 a Tne medals awarded in the Photographic Competition (Stanley Show), will be presented on the 9th inst., at Wortley Hall, Seven Sisters Road. A musical evening willbe held. Invitation tickets can be obtained on application from Mr. Herbert Smith, 29, Finsbury Pavement, or Mr. W. Goddard, 261, Seven Sisters Road, N. —— 0: Sizes and Capacity of Cylinders. THE following particulars cannot fail to be of interest to all lanternists. The cylinders spoken of are usually tested to about 4,000 lbs. to the square inch, and contain gas compressed to 120 atmospheres. A Cylinder containing 5 Cubic feet will measure 32 in. x 14 in 6 ” ” 33, xX 16 ,, 10 . 4 ,, x 214,, 15 5 a 4 ,, x 264,, 20 5 4, x Si3,, 40 ss 54 ,, x 852, 80 i 7 4 x 40 ,, 100 7 4, x 450 ,, We have to congratulate Miss Catherine Weed | : This is introduced at the union 1. \ : bottle D having been half filled with water ; containing two teaspoonfuls of carbonate of soda 2 The Optical Magic Lantern Journal and Photographic Enlarger. Compressing Oxygen at Home. Witn a gas bottle of the type mucii used in America, it is uot a difficult matter for anyone io make, and compress oxygen in sulficicnt quantities to supply the requirements of an entertainment of several hours duration. No pump is required with an apparatus which has been invented by Mr. Arnold, and introduced by the McIntosh Optical Company of Chicago. The oxygen undergoes compression at the same time that it is being generated. The cylinder I measures 42 inches in hei and -has a diameter of 12 inches. ght, This with gas : compressed to 100 lbs. to the square inch will contain between 18 and 19 feet. ' In the retort A is placed 3 Ibs potassium ' chlorate and 1 Ib. black binoxide of manganese. The wash is attached at the union 2. A piece of flexible high pressure steam hdse J extends from the wash bottle to the cylinder. When heat is applied to A as by placing it on a fire or gas stove, oxygen will be given off, and ' pass into the wash bottle D with a bubbling sound, and after the lapse of a minute or two, to ensure the hot-air passing off at the end of the tubing J, connection may be made with the bottle or gas container by screwing up the union 3. . Having ascertained that the globe valves 1,