The second top, 3/4 of an inch above the first, surmounted by a brass or copper plate, to which the ring of suspension may be fixed.
A gauge is first cut out out of brass or copper plate to suit the curvature of the lens, the circular arc being traced by a pair of compasses.
Upon the two sides of its breadth, two rows of round brass hooks are placed, about half an inch apart; they are soldered to a copper plate fixed to uprights by means of screws.
A copper plate may be used for about 3000 impressions, after which it may become too much worn for satisfactory chart printing.
A piece of copper plate wrapped once round the iron cylinder like a socket, but with interposed paper to prevent contact, had its edges connected with the wires of the galvanometer.
Thus the electricity evolved from the copper plate (149.
In this dry condition it can be cleansed of color as easily as a copper plate, and if a stone thus polished is engraved with a steel tool, it is possible to make several impressions from it just as from copper.
I planned that as soon as I attained the skill, I would write them with an elastic steel pen on a copper plate covered in ordinary manner with etching surface, etch, and let the copper-plate printers print them.
It can be used not only for all kinds of writings, but also for illustration that does not demand the supreme perfection of copper plate.
The alkalines seemed to be best for use on copper plate, and I obtained such clean impressions that the stone did not take on even a vestige of ink in any spot except the design.
This is made of alternate discs of copper and zinc with a piece of cardboard of corresponding size between each zinc and copper plate.
The method of etching a copper plate is similar to that already described for etching zinc plates, excepting that sesquichloride of iron is used instead of nitric acid.
A copper plate, cleaned so that it is free from grease, is introduced into a large box into which has been blown a very finely powdered resin, which is allowed to settle somewhat before putting in the plate.
This negative thus obtained is printed on to the zinc or copper plate, is then etched much as in the case of the simple line block.
C is the cathode plate to be covered, and A is a copper plate.
It has been stated that a simple cell polarizes rapidly on account of hydrogen bubbles that form upon the copper plate.
A copper plateis placed at the bottom of the glass jar, and upon this rests a solution of copper sulphate (bluestone).
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "copper plate" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
