. The American annual of photography. water colour stamps colour it a light yellow all this over your autochrome and you will find that a verysmall amount of yellow in this cover glass will counteract theblue and your slide will be useable at least. I have a birds-eye view of one of the eastern cities, which was a lovely bluecast when completed owing to a leak in my dark slide, at oneend. A light yellow cover glass corrected this and it is almostas good as if it had been free from light fog in the find that I have neglected to give the formula for the Wat-kins Thermo Pyr
. The American annual of photography. water colour stamps colour it a light yellow all this over your autochrome and you will find that a verysmall amount of yellow in this cover glass will counteract theblue and your slide will be useable at least. I have a birds-eye view of one of the eastern cities, which was a lovely bluecast when completed owing to a leak in my dark slide, at oneend. A light yellow cover glass corrected this and it is almostas good as if it had been free from light fog in the find that I have neglected to give the formula for the Wat-kins Thermo Pyro so will append it here. No. I—Pyro 74 grams Potassium Metabisulphite 37 grams Sodium Sulphite, dry 400 grams Water to 2000 cc No. 2—Sodium Carbonate, dry 400 grams Potassium bromide 18 grams Water to 2000 cc Use one part of each with six parts of water for auto-chromes. The factor is 5. This is the standard thermo de-veloper and can be used with the dilutions given in Scienceand Practise of Photography—by Alfred Watkins. 141. WATER PANORAMS By C. H. CLAUDY ROM his photographic infancy the amateur istaught that different cameras are suitable fordifferent kinds of work. He is told that a viewcamera is good for views, a speed camera goodfor speed pictures, and that a speed camera isnot good for views, nor a view camera good for speed learns that a kodak is better suited to snapshots than it isfor the making of copies, and that a telephoto instrument isnot the most convenient for the making of portraits. He also is told that while he can make panorama pictureswith most any kind of a camera by making successive nega-tives and joining the prints, the easiest way to make a pano-ramic picture is by the use of a panoramic camera. He learns that there are two different kinds of panoramacameras. In the one—which is expensive, heavy, elaborateand extremely efficient—the whole camera revolves, while aroll of film unrolls over a slit in the inside of the
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