l, all of which he has obtained, it is not too much tohope that, before lated buildings which comprise the station at Trappes are of the utmost utility for mechanical operations. is the rotating house in which balloons are inflated. the Transvaal war has seen its close, the utility of the However,… … A SIMPLE HYDROSTATIC LEVEL. ment is accompanied by a checking appa- from the top as desired, the gage being ratus, with the records of which the in- kept at the edge of the brick or stone wall dications of the first instrument must agree. . templet, from which the required level is to be meas- kite…
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