i88 re;ports of investigations and projects. 



The reactions may be briefly written : 



(CH3\C0 + NH^OH [or H + NHOH or NHOH(NH„0) -f NH,0H1^ 

 (CH3),C = N0H + H,0; 



(CH3),CO + NH,OH + H + cr5::^(CH3\COH + Cr+NH,OH (or as 

 above) ^"^ 







+ 



(CH3),C = NHOH + CI + H,0 ^(CH3),C = NOH + H + CI + H,0, etc. 



When alkalies are added to the acetone and hydroxylamine the reaction is 

 very greatly accelerated and goes nearly, or quite, to completion. We are 

 studying this very important reaction with the idea of clearing up a number 

 of other points. 



Dr. J. M. Johnson, Dr. R. F. Brunei, Dr. G. H. Shadinger, Dr. F. ]\I. 

 Rogers, Dr. E. E. Reid, and Messrs. Desha, Nirdlinger and Slagle have 

 collaborated in the above investigations. 



Bancroft, Wilder D., Cornell University, Ithaca, New York. Grant No. 

 411. Systematic study of alloys. (For previous reports see Year 

 Books Nos. 2, 3, 4, 5, and 6.) $1,000. 



The results of experiments on the electrolytic corrosion of copper- 

 aluminum alloys have been published in the Journal of Physical Chemistry, 

 volume 12, page 180 (1908). The different phases show marked differences 

 as to corrosion in presence of different salts; but so far no satisfactory 

 theory has been devised. The results demonstrate anew the utter futility of 

 electromotive-force measurements as a means of predicting chemical corro- 

 sion. The problem is really one of the formation and properties of surface 

 films. 



During the past year most of the time has been spent on the iron-carbon 

 alloys. A satisfactory modification of the General Electric Company's 

 vacuum furnace has enabled Dr. Bancroft to melt and then to chill-cast the 

 alloys in a vacuum. In this way samples have been obtained containing up 

 to 6 per cent carbon which show no free graphite. These samples have 

 been annealed in a vacuum at 1,000° for periods of 100 hours and over. 

 Under these circumstances equilibrium is reached ; but it has not been 

 possible to quench the alloy sufficiently rapidly to prevent the crystalline 

 structure from changing to such an extent that no conclusions could safely 

 be drawn from a microscopic investigation. Dr. Bancroft is now planning 

 to determine heating curves in a vacuum. It has been proved that precipi- 

 tated graphite is reabsorbed and that ferrite and graphite are not the stable 

 forms, as has been claimed by Heyn. Mr. G. B. Upton has put forward a 

 tentative diagram which appears to account for all the experimental facts 

 known so far. 



