54 MASS. EXPERIMENT STATION BULLETIN 327 



Pine tar soap in the liquid form was only moderately effective when diluted 

 at .5, 1, and 2 percent. In the flake form a solution prepared at the rate of 8 

 pounds in 100 gallons was very effective but lesser amounts were only moder- 

 ately so. In most of these trials the effectiveness of the soap for red spider 

 control was greater at 60°F. than at 80°. 



FEED CONTROL SERVICE 

 Philip H. Smith in Charge 



The Feed Control Service comprises not only feed inspection, but several 

 other activities, as listed below: 



Feed Control (General Laws, 1920, Chapter 94) 

 Seed Control (General Laws, 1927, Chapter 94) 

 Dairy Law (General Laws, 1920, Chapter 94) 

 Advanced Registry Testing 

 Miscellaneous Work 



Feed Control. (P. H. Smith, A. F. Spelman, J. W. Kuzmeski, F. A. 

 McLaughlin, J. T. Howard.) During the fiscal year, 1,651 samples of feeding 

 stuffs were officially collected and examined in the control laboratories. The 

 results show that at least 95 percent of the samples collected varied less than 

 1 percent from stated guarantees in protein, fat and fiber content. The gross 

 receipts from the registration of feeding stuffs in 1935 (calendar year) were 

 $21,400, derived from 1,070 brands at $20 each. 



Seed Control. (P. H. Smith, F. A. McLaughlin, Olive M. Hoefle.) From 

 October 1, 1934, to October 1, 1935, the seed laboratory analyzed 1,356 samples 

 of seed, of which 743 were collected by the State Commissioner of Agriculture 

 and 408 sent in by dealers and farmers. Tests for viability were also made on 

 205 ingredients found in the 41 Special Mixtures. 



Classification of these analyses is shown in the following summary: 



Official Non-official 



Samples Samples Totals 



Purity analysis only 45 47 92 



Purity and gemination 209 83 292 



Laboratory germination only 489 278 767 



Laboratory germination of Special Mixtures* 205 205 



1,356 



♦Samples germinated as a check on the quality of seed contained in the 41 official samples which, 

 by law, require only the statement of purity. 



Field tests to determine trueness to type were conducted in cooperation with 

 the Department of Vegetable Gardening, which tested 207 samples of vegetable 

 seed, all of which were collected and submitted by the State Commissioner of 

 Agriculture. 



Dairy Law. (P. H. Smith, J. T. Howard, H. L. Allen.) During the year 

 ending December 1, 1935, 9,226 pieces of Babcock glassware were tested. Con- 

 demned glassware consisted of one pipette and 38 cream test bottles. One 

 hundred and thirty-six certificates of proficiency were awarded. 



Two hundred and twenty creameries, milk depots and milk inspectors' 



