52 



tliorono-h botanical survey of the State may be made. The irrigation 

 equipinent of tlie station is biietiy described. 



Geology of the Laeamie Plains, J. D. Cox ley, Ph. D. (pp. 15- 

 18). — A brief account of the geology of this region, from wliidi the 

 following is taken: 



111 giviiiij the geological horizon of the Wyoming University experiment farm 

 grass ticlils, anfl garden the writer is at variance with the United States geological 

 maps, which place the Laramie Plains in the Dakota Gronp. 



From a study of excavations made in the city of Laramie and of the red sandstone 

 rjnarries to the north it is certain that Laramie and the grass fields are in the Tri- 

 assic formation. The red sandstone strata <lips ahont liO degrees to the west, passing 

 heneath the 13ig Laramie River at the experiment garden, and must be several thou- 

 sand feet beneath the surface at the experiment farm, '2 miles to the west. • * • 

 Some Middle or Upper Cretaceous fossils are found 'jr> miles north of Laramie, and 

 also in the Laramie Gronp, 20 miles to the northwest. At the latter point a stratum 

 of coal dips northwest toward ihe foothills. The crest and southeast side of the moun- 

 tain, of which the Laramie Group was once the northwestern slope, seems to have 

 been carried away. This mountain must have extended to within a few miles of the 

 oxperiment farm, at which point another mountain probably rose to the east, the 

 west slope of which was coven'd by the Laramie Grouji, conformable with the Cre- 

 taceous and Triassic beneath. The latter mountain has also been torn down by the 

 hand of time, laying bare the Cretaceous formation, whose crumbling ami disinte- 

 grated rocks, mixed with local drift gravel, form the soil of the experiment farm. 



Note on soil analysis, J. 1). Conley, Ph. D. (p. 18). — Analyses 

 of soils from each of the station farms will be i)ublishcd in a future 

 bulletin. The tbllowing brief general statement is made regarding the 

 soil of the station larm at Laramie : 



"There is enough alumina in the soil at the Wyoming University 

 experiment farm to give it body and a good consistency. It is a light, 

 sandy loam, possessing enongh of the essential ingredients for the 

 native grasses to thrive well under irrigation alone. On a neigh- 

 boring ranch in similar soil, the blue joint {Agropynim glaucum) has 

 l>ro(luced 1.1 tons per acre." 



Flora of the Wyoming University experiment farm, A. 

 Nelson, M. S. (pp. 18-21). — This is a brief preliminary report on a few 

 species of tiie plants found growing wild on the station farm. Tlie fol- 

 lowing species are descril)ed: Toicnsrnflid .scricea, Plilo.r avsjiitosd, 

 1*. douf/Iasii, Echinocactus simpsoni, (Enothcra caspitosa, mountain lily 

 {Lciu'ocrhium »tontaHuin), plantain {Phintaf/o cripoda f), Opiiui'ui 

 rajiuesqiiii, llocky Mountain bee plant {('hvinc integri/olia), Ma I rant rum 

 coccineiimj yarrow {Achillea millcfotiuvi), golden-rod {Bigelovia gravco- 

 lens, var. albicauli.s)^ thistle {Cuicus scariosus), wormwood {Artemisia 

 pedatijidal)^ larksinir {Delphinium azureum). 



Weather report for April and May, 1891, A. M. Sawin, ^I. S. 

 (21-23). — A tabulated record of temperature and pre(;ipitation f«)r April 

 and the first 15 days in May, 1891, prepared by Dr. L. S. Barnes, of Lar- 

 amie. 



