EXPERIMEXT STATION EEPORT. 595 



■vre can only manufacture one carload per day will no doubt look 

 like a small one, in consideration of the amount of power and room 

 we have, but that is all that can be made with the present amount 

 of machineiy." 



''We are also sending you some photographs of both the interior 

 .and exterior of our plant, which we trust will give you some idea 

 of the heavy expense that is necessary to make a good product. 

 Every department has to have careful and trained men in order to 

 insure a uniform product, and in fact it must be unifonn or it is 

 nothing. To insure this it takes the careful and ever watchful eye 

 of a good, experienced chemist, well versed in the handling of both 

 vegetable and mineral oils.'' 



''The product which we are now manufacturing is the result of 

 many years of hard work, careful study and endless experiments, 

 added to thousands and thousands of dollars spent to accomplish 

 the same. We have made dozens of different soluble oils and ex- 

 perimented with them, some of which were satisfactory so far as 

 killing the scale went, but left a damaging effect from the oil upon 

 the trees." 



"We found that in order to make a product to kill scale it must 

 be done without penetrating, but by suffocation. At first we made 

 it with too much body and closed the pores of the trees, which was 

 as had if not worse than the penetrating, but after several more 

 years we got a basis which, from all appearances, seems to be right, 

 and is right to the best of our knowledge." 



''The present product is by far the most tedious and careful as 

 well as expensive of all the different experimental products which 

 this company has made and applied on the two-hundred-acre ex- 

 |>erimental orchard which is run in connection with this plant." 



At the time of my visit the factory at Martinsburg was not run- 

 ning, but I saw the machinery for mixing the oils and in the labo- 

 ratory was shown, in an experimental way, the combination of the 

 materials. A very high percentage of mineral oil is claimed for 

 this combination, and experimentally the combination can un- 

 doubtedly be made. Any process reducing the amount of the 

 emulsifier will reduce the price of the combination, of which the 

 crude oil is the least expensive material. Yet on this point Mr. 

 Stewart writes, "but owing to the very small margin of profit at 

 the present prices, we do not feel that it would be a paying invest- 



