of the pump obviously becomes doubled. The nor- the spat or infant oysters have been greatly improved dur- The improved rowlock herewith illustrated is claimed to mal speed is between 60 and 120 revolutions per minute. ing the last few years. be so constructed as to reduce friction between it and… … up, in such manner that the glass which covers the aforesaid rially increases speed in rowing, and that, while it is specially lbs. when the belt pulley is substituted forthe fly wheel. case will receive the action of the lighting tube containing applicable to racing boats, it is equally well…
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-463-267.webp)
