New York Agricultural Experiment Station. 359 
Two plats were selected this year on which to determine the number 
of weeds, one being the same as used last year, and the other a piece 
of ground just turned over from an old meadow. The latter lay adjoin- 
ing a roadway, and was found to be very full of foul seed. Neither 
piece of ground has received stable manure for a number of years, if 
at all. The countings were made about the first of July, August and 
September, the larger weeds being pulled and removed from the 
ground each time, leaving the smaller ones to grow until the next 
counting, the ground being cleared at the last date. 
The three plats of ground used for these experiments lie near one 
another, having practically the same kind of soil and exposure, and 
differing chiefly in the length of time since they were in meadow. The 
plat used in 1885 is marked A in the table, that used in both 1886 and 
1887 is marked B (C 11 in the records of the Station), and the second 
plat used in 1887 is marked C (G 2 in the records of the Station). 
The table includes by name those species that occurred in 1887, and 
also in one or both of the preceding years. Those which occurred in 
1885, but not in the other years, are as follows, with the number of 
individuals of each: Anemone Virginiana 1, Ambrosia trifida 68, 
Aster Novse-Anglise 3, Hypericum mutilum 1, Lactuca Canadensis 1, 
Pastinaca sativa 3, Poa pratensis 194, Polygonum acre 14, Polygonum 
Pennsylvanicum 2, Eubus strigosus 5, and Solidago Canadensis 4. 
Most of these species are adventive from the meadow, which in this 
case had only been turned under at the last plowing; they would 
not withstand much tillage. The largest number of individuals is of 
Kentucky blue grass. The kinds which occurred in 1886 and not in 
other years, with the amount of each, are as follows: Helianthus 
annuus 40, Lycopersicum esculentum 1, Stellaria media 1, Verbascum 
Thapsus 3, and Veronica peregrina 1. These species belong to culti- 
vated ground, being in part, not weeds proper, but accidental sowings 
of cultivated plants, which had occupied the ground or the vicinity 
the previous years. No species was recorded in both 1885 and 1886 
that was not found in 1887. The following are the species found in 
1887 not found in j>revious years : Daucus Carota 8, Erigeron Cana- 
dense 2, Lobelia inflata 2, Malva rotundifolia 4, Sisymbrium officinale 
1, and Silene noctiflora 1, all common weeds of roadsides and fields. 
Of the thirty-three kinds of weeds mentioned in the table the 
following are especially pernicious and troublesome to field crops: 
