22 
CHEMICAL SECTION. 
and should be put up in clean glass vessels , with a clean , new 
cork , and completely filled and sealed. 
Samples of milk should not be less than one pint, and 
should be thoroughlg mixed before being taken. 
Samples of rocks, coal or minerals should be selected by 
pulverizing twenty pounds to the size of hickory nuts, and 
selecting from these one pound. 
Samples of fertilizers are made by taking a sample from 
the unbroken package at the top, middle and bottom; these 
are intimately mixed on paper, and a quart selected and put 
in a clean, dry bottle and well corked. All expenses must 
be prepaid to the Station. 
In justice to manufacturers, dealers and consumers 
alike, the Station will make gratuitous analyses of the 
commercial fertilizers, only on samples taken by the 
agent of the Station, or on such other samples as are 
fully described on the Station forms for description, and 
taken in accordance with the Station instructions for 
sampling, and, furthermore, are properly authenticated 
by the certificate of the person drawing the same, and in 
addition, a witness who is a responsible person in the 
community, or the dealer from whose stock the sample is 
taken. 
Send with each sample any printed circular, pamphlet, 
analysis or statement that accompanies the article, or is 
used in its sale. 
As soon as an analysis is made, a copy of it is sent to 
the party who furnished the sample and also to the man¬ 
ufacturer, in order that there may be opportunity for 
explanation or protest, if desirable, before the results are 
published in the bulletin. 
Samples of soils are taken according to the object of 
analysis, either, (1) from one or from several spots in the 
field. (2) In case several portions of earth are taken from 
points distributed in a regular manner over the field, all 
of which are carefully mixed together and ten to fifteen 
