Kodachrome Test (2) light meter. The indications were not altogether satisfactory, checking and rechecking showing some discrepancies and inconsistencies. However, they were: No. 1, 250; 2, 145; 3, 145; 4, 225; 5, 250; 6, 225; 7, 190; 8, 190. (In April 1937 this meter was found to be reading much too low. It may have been off at the time.) Under the same conditions of illumination the paper on which this is written (using several thicknesses superimposed to avoid grey ing effect of transparency) is about 400. The camera used, a Cine Kodak Special, is equipped with variable shutter openings as well as with variable speeds. Since in using masks it is desirable to use the larger diaphragm openings (according to the manufacturer, I do not know why at present) and the purpose was to try out the effect of a wide range of exposure times,in order to note the effect of both excessive under- and over exposures, use was made of the variable shutter opening as shown in the following table: Diaphragm used. Shutter opening. Equivalent f-no. f.1.9 Full 1.9 1.9 1/4 2.8 1.9 1/8 4 5.6 Full 5.6 5.6 1/4 8 5.6 1/8 11 16 Full 16 16 1/4 22 16 1/8 32 This gives a range of diaphragm openings from f.1.9 to f. 32, as shown by last column and will insure exposures of normal time as well as excessive under- and over-exposures. As the camera was run at the standard speed of 16 frames per second throughout the test f.11, under the light conditions ex- isting at the time should, if the manufacturers' recommendations are correct, give the truest rendition of the color values. Exposures were made of 4 feet of film for each of the nine equivalent stop openings, in this order: 1, f.11; 2, f.8; 3,f.5.6; 4, f.4; 5,f.2.8; 6, f.1.9 7, f.16; 8, f.22; 9, f.32. The first 6 exposures (in the first line) should give rendition ranging from correct (f.11) by gradual steps of over exposure to extreme over exposure at f.1.9. The next three exposures ( in second line) should give rendition ranging from slight under-exposure (f.16) to extreme under-exposure at f.32. That is if the makers' recommendations are correct and the color balance of the film ideally perfect. However, it is expected ed that the result will show that different colors, to be correctly rendered, actually require different exposure times. In other words, it is anticipated that the experiment will demonstrate that Kodachrome film cannot give correct color ren-