3O WEEDS OF THE FARM AND GARDEN 



per cent. The sum of both is .939 per cent, a little less 

 than one per cent. The weight of the dirt will have to 

 be guessed at, as it varies greatly with different kinds. 



(The above method is for the use of those who have 

 not the apparatus for an exact analysis. The results are, 

 of course, only approximate, but are near enough for the 

 purpose of the law.) 



NUMBER OF SEEDS REQUIRED TO MAKE I PER CENT BY WEIGHT OF 5-GRAM 

 SAMPLE (EQUAL TO ONE TEASPOONFUL OF SEED) 



TIMOTHY 



CLOVERS OR MILLET 



Alfalfa 22 18 



Alsike 80 64 



Barnyard grass 70 56 



Black bindweed n 9 



Black mustard 64 51 



Blue grass 852 68a 



Bracted plantain 38 30 



Buckhorn 57 45 



Bull thistle 23 19 



Burdock 16 12 



Canada thistle 44 36 



Catchfly 45 36 



Catnip 53 43 



Chicory 40 32 



Cinquefoil 594 475 



Cirsium discolor 9 7J/j 



Cow herb '. n 9 



Crab grass 182 1-15 



Curled dock 36 28 



Cuscuta arvensis 84 67 



Cuscuta trifolii 192 156 



Cyperus esculentus .- 27 25 



Dog fennel 210 168 



False flax 45 36 



False red top 518 414 



Foxtail 40 32 



Horsemint 54 43 



Jimson weed 7 5 



Lady's thumb 36 28 



Lamb's quarter 72 57 



Mallow :... 15 12 



Meadow-rue 24 20 



Millet 27 21 



Morning glory 2 I 3-5 



