that tract the oral cavity. But no such direct applica- is accomplished by a rhythmic motion, plainly visible, it is necessary to have the negative lens fitted toand cor- the nature of which, however, has never been accu- tion of muscular force is needed to open and close rected for the… … alone, the exposure of the Board of Trustees would be SV °f a second, of the New York Public with the telephoto- Library it was an- graph adjusted to mag- nounced that the Board nify eight times, it of Estimate and Appor- would require an expo- tionment would pioba- sure of one second ; but bly be…
Munn · Lens · Gas · Device · Apparatus · Scientific American · Houdin · Illustrated catalogue · Gold medal · Photographic lens · Motor carriage · Working drawings · Metric system · Sheet metal · Truant school · Fire escape
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