Arizona republican., 1911-05-12
Muskegon, Mich, 4-13-11. Massie X Sons, Phoenix, AriZ.

\
 I GCnuemen:-
 | Replying to your letter nf ! ApTi! 7th there are tl:o very I important factors that must be considered Tn the manufacture I of -efrigerators, one is the cir | cuiAtion and the other is .hc n- sUlation. Ire construction of q refrigerator is made up pf de- \ tails that are worked out from years of experience. There are q number of good iusulators \ known and in use today. It is not SD much the insulator you q use as it is the way you use it. Mineral wool, felt, charcoal, charcoal sheathing, granulated 4 wool, rock wool. cotton, seaweed. granulated cork. cork shaVings and numerous other insulators \ are known to the manufacturer of refrigeratOrs. IL is d fact that the best insulator known I to science today is vacuum but 4 it is not practicable to use a i vacuum. The next best in sulator known to science is con q fined air or air cells. If it were \ possible to build a refrigerator VI with small compartments, and t confine the air. so that it could ! not move. that would be the \ best insulator that we could VI rus,rr1I h.. fFnaffna1 ! use. In the past we have used q a great deal of charcoal when | We could arrange to buy this. ! We use a large quantity of it, T buying it in carloads, put some \ times we are compelled tn use some other insulating material. 4 We have made numerous tests, both scientific and comparative, ! and We find that there is very little difference in a number of the best insulatOrs. The secret \ of all insulation is the confined air that is in the cells of the various material that we use, l and the success of the insula- tor depends largely upon the method used in handling these \ various insulating materials. The insulation of a refrigerator l is similar to the strength of a chain. It is only equal to the weakest part, hence great care l is necessary in using insulating materials in a refrigerator. No doubt you will hear different manufacturers claim great re- suits from the particular mater
 N ial that they use in insulating their refrigerators. We will be
 N candid with you. and state that most any of the materials that we mentioned above will produce
 M good results, if it is properly used.
 M We have always advocated charcoal. and we think great deal of it as an insulating ma " terial. provided the construction U of the refrigerator is such that M if will not settle. That is one
 M of the strong points that we M make in our construction, that N the material we use does not settle.
 Al In our experience we have
 M been successful in using these 2 several materials, and Go not W hesitate to say that it is not W necessary to condemn any of the M materials used for insulating re- W frigerators. They are all good, W and when properly used. will N show very little difference in the N results. We have always fla M vored charcoal perhaps more W than any other material, but W some of our larger customers
 W prefer other insulating material. W We are sending you via U. .. MI Express today q sectional corner 'N of the Alaska line. which possi- M bly may not exactly represent
 N our 1911 goods. but will enable
 M you to demonstrate the con- M struction of the refrigerators to lN better advantage, than without M the use of it.
 M We appreciate very much the M interest you take in the Alaska M product. and therefore are will
 W ing to help you all we can to
 W increase your sale on refrigera- M tors.
 W Yours truly,
 M The Alaska Refrigerator Co.