Scientific American, Volume XLIII., No. 25, December 18, 1880, page 89 by Various Authors
<< Return to Title Details & Download90
ing 40 feet. By placing a forcing pump in the valley I could then raise the water to a height of 40 feet, and having erected a tank at that height and connected it by means of pipes with another tank 1,200 feet distant, but on the same level, the water according to a law of nature would travel over the distance of 1,200 feet. But finding it very difficult to erect tank 40 feet high, I would prefer to construct the whole on the incline. Will the forcing pump having just power enough to raise the water 40 feet perpendicularly into the tank have sufficient power to force it into a tank of the same elevation through 1,200 feet of pipe running on the incline, or must I have more power, and how much more? A. The forcing pump must have enough more power to overcome its own additional friction and the friction of water in the long inclined pipe. Allow 20 per cent more power at least.
* * * * *
MINERALS, ETC.--Specimens have been received from the following correspondents, and examined, with the results stated:
Box marked C. H. (no letter.)--1. and 2. Garnetiferous quartz rock. 3 and 4. Micaceous quartz rock. 5. Granite. 6. Basalt with traces of chalcopyrite.--L. C. G.--They are fossil sharks' teeth, common in marl beds.--J. E. C.--1. Iron sulphide and lead sulphide. 2. Quartzite, with traces of galena and molybdic sulphide. 3 and 4. Dolomite. 5. Fossiliferous argillaceous limestone, containing traces of lead sulphide. 6. Lead sulphide in argillite.--C. T. M.--1. A silicious kaolin. 2. Similar to No. 1. Useful if mixed with finer clay for white ware. 3. Silicions carbonate of lime--some of this would probably make fair cement. 4. Brick--the clay from which this was made would probably be useful to potters. 5 and 6 are very silicious clays.
* * * * *
COMMUNICATIONS RECEIVED.
Liniment. By J. L. T.
Seen and Tangible and the Unseen and Intangible. By J.L.T.
On Cheap Railroads. By R. P. N.
On a Meteor. By W. E. C.
* * * * *
<