lty arose from the extraordin- ary lightness of hydrogen, which was only 7; as heavy a Impeding Patent Office Business, as the air. The glass in which the weighing was done ses eae The many ways in which the business of the Patent might be 200 grammes, while the hydrogen contained Office is being… … stacked up on triple rows of pine shelves in the corri- duced in ScrENTIFIC AMERICAN SUPPLEMENT, No. dors, where moth and dust may easily corrupt and 837, page 18368), one of the most striking figures, says ips 4 where a fire may break out if thieves do not break in. Mr. Berthelot, of the Institute…
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