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Roundness and Shape of Mississippi River Sands
Sands collected from the bed of the Mississippi River at intervals between Cairo, Illinois, and the Gulf of Mexico show no evidence of becoming rounded as a result of attrition during transportation.
Effects of Transportation on Sedimentary Particles: Part 1. Transportation
Transportation affects sedimentary particles both by abrasion and by progressive sorting. The latter factor has not received the attention it deserves, and probably is more important than abrasion
Lead Isotopes in Geology
Mineral composition of Mississippi River sands
INTRODUCTION Plausible hypotheses often become established as generally accepted facts by the mere passage of time and the lack of a direct challenge. Geology has afforded, and still affords,
Experiments on cumulative dressings of fertilizers on calcareous soils in South-West England. I.—description of field experiments and soil analysis for phosphorus residues†
Most of the work done previously on the value of fertilizer residues has been on acid, neutral or slightly calcareous soils so experiments were started in 1955 on the calcareous soils of the
An account is given of a detailed gravity survey carried out on the Salmon Glacier and the adjoining snow field. The reduction of the data is complicated by the extreme irregularity of the terrain
Some cardiovascular effects of the insect repellent N,N-diethyl-m-toluamide (DEET).
In a series of pharmacological studies in rats, DEET was found to decrease the hypotension and bradycardia associated with acetylcholine injection; epinephrine, norepinephrine, and histamine responses were not altered.
Experiments on cumulative dressings of fertilisers on calcareous soils in South-West England. II.—phosphorus uptake by ryegrass in the greenhouse†‡
The P status of the calcareous soils described by Russell1 was evaluated in two greenhouse experiments using ryegrass as a test crop. Soils were arranged by yields into very responsive, moderately