Document Zn0k40BdqQq1z7OQmgax7ENY0

October !,) 0 Mr, T, T* Meccson General 'ileotric foinpany rart-roh Laboratory I Liver i-oad .ohcnectsdy, M. Y. T sar Mr. codaon : I on ir.utih fuiterested is your letter oi* vcfcober 11* 'Lie range or concentration or load- i*i air in which we are inxerested is 1 in iOy to 1 in 107 by volume, which is approxi mately COOl of the concentration you obtain now for 1 /4 of the scale* If you feol that this different range could be cover ed equally well, this would beocne quite interesting* I prosuae that the method would cocais* in decreasing the source or radiation and increasing the sensitivity of tho absorption measure ment* Thors still remains'the disturbing factor of the residual reeding, This -wight conceivably b less noticeable at the lower concentrations, but I doubt whether it would bo .eliminated, since it is a we] 1 ?cr.Gv?n characteristic of orFuno-aetallio compounds that they are decomposed by strong light, Toassltl:/ the quit,stent could be so designed, as to be easy to clean* I T'JU- be much interested in your comments regarding the rossibility of shifting the range of the instrument to that indicated above* If this does not look too hopeless, I think it would bo well worth while to push th experiment a little further. "cr y t r u ly y ou r s, ,7 GlsAIIC , c c : If*. ' " . f . 'Iach lo * ('ergo OLLingaert /* i KE 0 0 2 2 8 7 8 N22702