the sea at different IMPROVED LIFTING JACK. depths and localities. The new instrument resembles a We illustrate herewith a new and simple lifting jack, ap- RESULTS OF THE CHALLENGER EXPEDITION. The following observations are reported by Professor spectroscope with telescope attached. The sea water… … stances where the test of propor- constructed. tion was carefully tried, it was Patented through the Scientific found that more than half the mud American Patent Agency, February consisted of shell fragments. There is no doubt that a stra- be examined is poured into a triangular bottle, which takes…
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