hese would have been over-exposed, and some of the de- tory through the generosity of Mr. William H. sired results thereby lost. These fields of work are extremely valuable results is precisely the conclu- Crocker, to observe the total solar eclipse of May sion drawn from the polarigraphic results.… … tion to the fact that if these annual displays are a adopted by nearly all eclipse parties. The lens is correct indication of the year-by-year advance made at the top of the tower, and the plate holder, moving by clockwork, is at the bottom. The lens is supported in the industry, the past twelve…
Patents · Naval · Apparatus · Cable · Steam carriage · Scientific American · Three years · Sulphuric acid · Green island · Inner corona · Puget sound · Working drawings · Sound navy · Horse power
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