YELLOW BATH.
| Gamboge | 50 | parts. |
| Saffron | 50 | " |
| Distilled Water | 150 | " |
The yellow bath must be boiled for five minutes, and filtered.
VIOLET BATH.
| Permanganate of Potash | 10 | parts |
| Distilled Water | 100 | " |
GREEN BATH.
| Prussian Blue | 50 | parts. |
| Oxalic Acid | 50 | " |
| Picric Acid | 15 | " |
| Distilled Water | 150 | " |
Dissolve by heat.
Aniline colors may also be used, and are both cheap and easily prepared. Dissolve one ounce of any aniline color in ten ounces of distilled water, and immerse the transparency in the solution till the desired tint is obtained. Wash in several changes of water till the whites are clear. Dry in a place free from dust.
Sir Knight R. H. Wyld says that in developing some pictures taken with a pocket Kodak the pictures came out positive instead of negative. The picture was overdeveloped. Probably the developer worked rather slow, and the picture may also have been under-exposed. The rest of the material will probably be all right with proper time exposure. Cold sometimes retards the action of the developer. The temperature of the developer should never be below 65° Fahr. The process for making plain salted paper was described in Nos. 796 and 803, and was also given in the circular issued last fall announcing the photographic competition.
J. W. B. encloses two prints, and asks what is the matter with them. The prints were made too dark, and in order to tone them out they were overtoned. The negatives are evidently thin, which also accounts for the gray tone of the print. The blue print formula may be found in Nos. 797, 823, and 828.
Sir Knight Russel Senior asks if different colored inks can be used to color transparencies, if aristotype prints put in a glycerine solution to keep them flat injures the gloss when they are ready to be burnished, and for a simple way to enlarge negatives. The colored inks are made from aniline colors, and it is better to prepare the color according to directions given in this paper for using aniline colors. Glycerine does not affect the polish of the print. Directions for enlarging may be found in No. 801, March 5, 1895. If you have not a file of the Round Table, enclose five cents to Harper and Brothers, and the number will be sent to you. As the directions occupy all the space devoted to the Camera Club, they cannot be repeated in "Answers to Queries"; but another paper on enlarging will be printed in a few weeks for the benefit of our new members.
Sir Knight Leonard S. Whittier asks if the editor has heard of the "Quad Camera," and if it is a good camera for five dollars, and also asks the addresses of firms that manufacture cameras at this price or less. The "Quad" camera is said to do very good work for so small a camera. The Eastman Kodak Co., Rochester, N.Y., Kombi Camera Co., Chicago, Ill., Manhattan Optical Co., Cresskill, N.J., are among the firms that manufacture low-priced cameras. A card sent to Scovill, Adams Co., or E. & H. T. Anthony and Co., New York, will bring a catalogue of cameras and photographic outfits.
Sir Knight Herschel F. Davis wishes a good formula for a one-solution metol developer, and asks if the exposure should be shortened when using metol for a developer. A single solution of metol is made as follows: