the models and he must go on with the explanation. On he went again for another hour when the Chief that it was only after long and laborious study that he was able to understand the invention ; still he must do his best and again he proceeded when the Chief Justice again interrupting him said : 'Would it not be far better for the parties to refer this case to mechanics or engineers or other persons who are familiar with patents.' Mr. Bovill said 'It would be infinitely better to do so ;' and Mr. Grove counsel for defendant acquiesced in this view. The in such cases where the jury was not composed of mechanics was hopelesi and that the decision of CAMPBELL'S COMBINED LANCE AND PISTOL. ments of lancers and pikemen still exist ; and these troops were recently employed by the Mexicans in mediately. description. The handle A of the weapon is con structed of wood : while the shaft and lance which from the weather. As the barrel is revolved the teeth force the slide down and it immediately flies back into the next space of the ratchet teeth by the such a jury must be like a 'toss up' and very un satisfactory. After consultation with their clients it was agreed to refer the whole case to Mr. Montague Smith Q C. a gentleman well versed in patents and mechanics. This sensible reference was manifestly satisfactory to the jury that had been empanneled to try the case. pecially and mechanics in general have frequent oc casion to use. The calipers are provided with a scale legs. This scale as well as the leg B to which it is attached is one piece of steel and is spaced off and numbered to correspond with inches or parts of an inch so that the person using the tool may instantly him to read the register at a glance. The use of the tool is sufficiently evident in the engraving without further comment ; and we think that all mechanics will agree with us in saying that this is a very con venient form of self-regulating calipers ; they may be made on this principle for either inside
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