FORTY-FIRST ANNUAL CONVENTION 303 



Hemlock 6 17 



Tamarack 6 15 



Ash 5 20 



Maple 4 18 



Birch 4 20 



Poplar 4 20 



Cottonwood 4 20 



Tupelo 4 20 



Basswood 4 20 



Beech** ; 4 20 



Red Gum 4 10 



Sycamore 3 20 



*Not generally treated. 



**"White Heart." 



Revised May 24, 191 3, by Winslow & Teesdale. 



It must be kept in mind that these are estimated averages, 

 and in specific cases local conditions such as climate, soil, drain- 

 age, character of the timber, etc., may cause the actual life to 

 vary considerably from the estimated averages. 



In the table given above, showing the life of the different 

 woods, it will be noted that some of the woods that are short 

 hved, when treated ,the length of their life is greatly increased. 

 For the tank proposition, however, we could not very well use 

 creosote or similar oils which are generally used for preserving 

 wood, owing to their disagreeable odors. Neither would mineral 

 salts be practical on, account of their solubility in water, hence 

 we are using the untreated wood. 



I might say that the writer has already an order for 500 

 tanks from one firm and prospective orders for thousands. We 

 believe that this is one thing that everybody interested in dairy- 

 ing can unite on. Some of the experiment stations have already 

 begun to make tests with these tanks among the farmers of their 

 state. 



At the meeting of the executive committee of the American 

 Association of Creamery Butter Manufacturers, held in Omaha, 

 Neb., on June 24, the contract for the wooden cream tanks was 



