 | William Henry - Chemistry - 1823 - 760 pages
...being crossed by an arrow at right angles to it, directed as in the figure. Through the centre ( and at right angles to the plane \ of the slip of card, there...parallel to the slip of card AB, the circular discs of card, marked respectively with the letters N and S, and with arrows parallel to, but pointing in a... | |
 | William Henry - Chemistry - 1823 - 682 pages
...being crossed by an arrow at right angles to it, directed as in the figure. Through the centre/ and at right angles to the plane ' of the slip of card, there...ends of which are fixed, in planes parallel to the »lip of card AB, the circular discs of card, marked respectively with the letters N and S, and with... | |
 | William Henry - Chemistry - 1823 - 278 pages
...on each side of which a line ab is drawn along the middle of its length, the end o being marked _f_, the end b — , and the centre c being crossed by...Through the centre and at right angles to the plane of the slip of card, there is made to pass a slender stem of wood, at the two ends of which are fixed,... | |
 | William Thomas Brande - Chemistry - 1830 - 682 pages
...being crossed by an arrow at right angles to it directed as in the figure. , Through the centre and at right angles to the plane of the slip of card, there...parallel to the slip of card AB, the circular discs of card, marked respectively with the letters N and s, and with arrows parallel to, but pointing in a... | |
 | William Thomas Brande - Chemistry - 1830 - 678 pages
...(see the wood-cut) is a slip of card, on each side of which a line ab is drawn along the middle of its length, the end a being marked + , the end b — ,...Through the centre and at right angles to the plane of the slip of card, there is made to pass a slender stem of wood, at the two ends of which are fixed,... | |
 | Henry Minchin Noad - Electric power - 1844 - 512 pages
...Roget. AB is a slip of card, on each side of which, a line ab is drawn along the FIG. 201. middle of its length, the end a being marked + , the end b — ,...Through the centre, and at right angles to the plane of the slip of card, there is made to pass, a slender stem of wood, at the two ends of which, are fixed... | |
 | William Laxton - Architecture - 1844 - 506 pages
...which, a line ai is drawn along the middle of its length, the end a being marked + , the end 4 — , and the centre c being crossed by an arrow, at right...Through the centre, and at right angles to the plane of the slip of card, there is made to pass, a slender stem of wood, (at the two ends of which, are fixed... | |
 | Henry M. Noad - Electric power - 1849 - 534 pages
...being crossed by an arrow, at right angles to it, directed as in the figure. Through the centre, and at right angles to the plane of the slip of card, there...parallel to the slip of card AB, the circular discs of card marked respectively with the letters W and S, and with arrows parallel to, but pointing in a contrary... | |
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... the end b — , and the centre c being crossed by an arrow at right angles to it, directed as in the figure. Through the centre ( and at right angles to the plane \ of the slip of card, there is made to pass a slender stem of wood, at the two ends... 