Proceedings of the Indiana Academy of Science (Volume 1920-1921)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...amount of dip. Example: If aneroid reads 700 feet at a given point and outcrop is followed east one-quarter mile and then reads 670 feet, showing strata dips east 30 feet in one quarter mile. Supposing second reading was 732 feet then strata dips west 32 feet in one quarter mile, etc. An experienced geologist should be assigned to scouting work. The greatest value of this method is that it permits a large territory to be covered rapidly and a great part eliminated. An experienced man will be able to find most of the structure. Later, if deemed advisable, the various structures reported by the scout can be worked in detail by either of the first two methods.;' An Improved Form Of Mercury Vapor Air Pump. Chas. T. Knipp--University of Illinois. (Abstract.) The mercury vapor pump described in this paper retains the same simple valve arrangement described recently by the writer, but on the other hand replaces the umbrella that deflected the mercury vapor downward through an annular throat by the commonly used aspirator nozzle through which the vapor issues vertically upwards. This necessitates an interchange of connections leading to the supporting pump and the vessel to be exhausted. This pump, single stage, will operate on any oil supporting pump of the grade of the Nelson pump. In addition to its speed, its simplicity of design and ease of construction are important points, and when constructed of pyrex glass is durable. The paper also gives the data obtained when several of these pumps are placed in tandem. Again, a three-stage pump retaining the same general principle is described, designed to operate on a poorly working water aspirator as a supporting pump. The mercury vapor for each stage is supplied from the same boiler, yet at different pressures, the h...