No abstract

Experimental results have been comniunicated which prove that nickel may be quantitatively separated from salts of arsenic acid in ammoniacal solution by means of the electric current. The striking and radical difference between the behavior of cobalt and nickel when deposited from such solutions has been pointed out. This hteresting property of cobalt is being made the subject of further study in order to determine why arsenic is always deposited with cobalt and u0.t with nickel In conclusion the writer wishes to thank Ilr. I,. W. McCay for very valuable advice and suggestions during the progress of this work.

ENERGY IN COPPER INTRODUCED BY COLD WORK 881 error in E to be of the order of 10 percent. It can be seen from these curves that this is so and that in the first run the release of latent energy begins at a temperature of between 100° and 125°C and is practically finished at a temperature of 250°C. As expected, the spread of the points becomes larger as the temperature increases. E, which is obtained as a simple average of the values of H(T), above 250°C, is given in Table 3 together with the value W. The last column shows the values obtained for E/W.A comparison between Tables 1 and 3 shows that our results, contrary to those of Sato, fail to show any saturation in this range of W so that the ratios of E/W are, as explained before, equal to e/w. On the other hand, the actual values of E/W are much closer to those of Sato than those of Taylor and his co-workers.It can be seen that the spread in the values of E/W obtained in the present investigation is of the order of magnitude of the variations to be expected on the basis of the errors involved in the annealing experiment. These errors, consequently, represent one of the factors limiting the accuracy of the determination of E/W.

No abstract

FOR some time it has been recognized that cracked gasolines are unstable and form gum upon aging in the presence of air. The