Document 6wb4yJxbjN7mdqGqweRG78wVR

4 Dooerabor 19# 1955 Mr* Charles Wealay Dunn 6o3 Fifth Avenue lio n York City Slew York Dear Mr* Dunn* I acknowledge herewith with thanks your letter of Docoiteer 17th with its ocssraonts on various affairs In general the conclusions which you have drawn appear to be reasonably well founded In so far as the observations have been concluded* On the other hand I do not believe it Is safe without further proof to draw any conclusions concerning the natural "XM content of chicle* I?or do I believe that wo can justify at present a conclusion that the manufactured gusa always appears on the market with leas than the quantities permitted by law* Concerning the control of chicle for Importation# I am not convinced that there la any feasible way at present for accomplishing this purpose through analytical means# and I am Inclined to feel' that If It Is shown that appreciable quantities of "X" are always the result of contamination# then sera form of Inspection and control of the methods of collection will be more useful than the setting up of a mechanism for analysis* X am not convinced that any method of sampling and analysis will serve adequately to eliminate contaminated materials from the market* It would be easier# I believe# to eliminate significant opportunities for contamination# ' In the matter of plant control I suspect teat It will be possible on the basis of proper Information to set up a simple mechanism of control which will check tee product at a point In the process at which a sample can be taken to represent entire batches of filtered gum base* Obviously the proper point at which to con Urol plant operations can be selected only on tee basis of future observations* K 00064 3 N 7584  Mr* C W* Dttm 2 m In accordance with your request I am enclosing herewith a list of materials which arc In the laboratory at present for study* Oar analytical work on these material# is being checked by Dr3* Cowgill and Prescott in accordance with an . understanding arrived at by Ur* Yates a n d repress* tatives of the manufacturers* From time to time as the necessity for dividing samples arises* Mr* Yates is issuing instructions as to the manner of division, X can assure you that if the three of us find that the manner of procedure la not giving adequate check* we shall suggest such alterations in the program as are nooeseary to accomplish the desired purpose# 1 am very glad the Washington mooting can be .postponed until my return from abroad. The work in our laboratory is laid out in a systematic manner and will proceed during my absence*. From time to time reports on analyses finished will be submitted for the moat part without more than the most conserve* tive comment and interpretation, 2t will be wise* la sy opinion# if we leave the interpretation of detailed results until such a time as more information is aval la* fel. Cordially yours# HASsio pKrff'A* "t ; 1 Copy to Mr, Yates K& 000(54 4