RULES AND REGULATIONS 



Sampling. 



(a) In order to secure a representative sample, equal portions shall 

 be taken from evenly distributed parts of the quantity of seed to be 

 sampled. Access shall be had to all parts of that quantity. 



(b) For free-flowing seed in bags or bulk, a probe or trier shall be 

 used. For small free-flowing seed in bags, a probe or trier long enough to 

 sample all portions of the bag should be used. 



(c) Non-free-flowing seed, such as certain grass seed, uncleaned 

 seed, or screenings, difl^icult to sample with a probe or trier, shall be 

 sampled by thrusting the hand into the bulk and withdrawing repre- 

 sentative portions. 



(d) The portions shall be combined into a composite sample or 

 samples. 



(e) As the seed is sampled, each portion shall be examined, and, 

 whenever there appears to be a lack of uniformity, additional samples shall 

 be taken to show such lack of uniformity as may exist. 



Bulk seeds shall be sampled by inserting a long probe or thrusting 

 the hand unto the bulk as circumstances require in several uniformly dis- 

 tributed parts of the quantity being sampled. 



Bags. (1) In quantities of five bags or less, each bag shall be 

 sampled. 



(2) In quantities of more than five bags, at least every fifth bag but 

 not less than five bags shall be sampled. Samples shall be drawn from un- 

 opened bags except under circumstances where the identity of the seed 

 has been preserved. 



In sampling packet seeds, entire unopened packets shall be taken. 

 Size of sample. The following are minimum weights of samples of 

 seed to be submitted for analysis, test, or examination : 



(1) Two ounces of grass seed not otherwise mentioned, white or 

 alsike clover, or seeds not larger than these. 



(2) Five ounces of red or crimson clover, alfalfa, ryegrass, brome- 

 grasses, millet, flax, rape, or seeds of similar size. 



(3) Two pounds of cereals, vetches, or seeds of similar or larger size. 



(4) Two quarts of screenings. 



Analysis. 



The New Hampshire seed laboratory will be guided in making purity 

 and germination tests by the rules and regulations prescribed under the 

 Federal Seed Act. 



Tolerance. 



Owing to the natural variation between tests, the following tolerances 

 shall be allowed between the percentages found by analysis, test or ex- 

 amination and the percentages stated on the tag accompanying the seed : 



For purity: Allowing "a" to represent the component being con- 

 sidered and "b" the difl"erence between that percentage and 100, according 

 to the following formula: 



8 



