Transactions of the Plymouth Institution |
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Page 44
... circle , ( 1 ) attached to the horizontal part of the frame , and through the centre of which the axis passes ; thus , the number of revolutions of the plate may be accurately estimated . The centre of the plate , is strengthened by two ...
... circle , ( 1 ) attached to the horizontal part of the frame , and through the centre of which the axis passes ; thus , the number of revolutions of the plate may be accurately estimated . The centre of the plate , is strengthened by two ...
Page 47
... circle of pasted paper , leaving a central portion of the coating free , for the perfect contact of the charging rod , which passes through the center of the foot , as indicated by the dotted lines in fig . 7 . These jars , when ...
... circle of pasted paper , leaving a central portion of the coating free , for the perfect contact of the charging rod , which passes through the center of the foot , as indicated by the dotted lines in fig . 7 . These jars , when ...
Page 49
... circle ; ( cn ) thus the interval may be regulated with very great precision : the connexion with the opposite sides of the jar are made through the two centres of action , as in the pre- ceeding case . This discharging electrometer is ...
... circle ; ( cn ) thus the interval may be regulated with very great precision : the connexion with the opposite sides of the jar are made through the two centres of action , as in the pre- ceeding case . This discharging electrometer is ...
Page 103
... iron arches , ( after having secured adequate abutments ) let each segment of a circle , or any other curve composing a rib , be formed of pieces , as long as can conveniently be cast ; and it is evident , that ON THE LARY BRIDGE . 103.
... iron arches , ( after having secured adequate abutments ) let each segment of a circle , or any other curve composing a rib , be formed of pieces , as long as can conveniently be cast ; and it is evident , that ON THE LARY BRIDGE . 103.
Page 104
... circle , are segments of an ellipse ; thus , in great measure , avoiding what I have been led to con- sider a defect , in other works of a like description . I allude to the unpleasant effect produced by small segments of a circle ...
... circle , are segments of an ellipse ; thus , in great measure , avoiding what I have been led to con- sider a defect , in other works of a like description . I allude to the unpleasant effect produced by small segments of a circle ...
Common terms and phrases
ages ancient Antennæ appear Arabian Arabic arches attractive force balls bird bridge cairn charge colour Common Comyns conductor connected costume cromlech Cuvier Dartmoor death Devon Devonshire diameter discharge diseases distance double Drew's collection E. M. Sp effect electrical electrometer equal explosion feet Firdausi free action Gen.-THE Godwit granite Grenofen greywacke Grimspound Habitat hill hut circles inches inclosure increased insulated interval kistvaen Latham limestone Longitudo male means Merivale bridge millemetrorum Montagu moor mortality Motacilla nameh natural observed obtained passed period Persian Persian Extracts-Appendix placed plate plumage Plymouth poem poetry poets possession proportion quantity of matter rare ratio relics river rock Sandpiper Shah nameh shot similar Sir William Jones slate south of Devon species specimen in Drew's spring square stones Subg.-(True supposed surface TABLE Tamar Temminck tion trackway Tringa whole WILLIAM ELFORD LEACH winter wire wood young چو
Popular passages
Page 17 - For men have entered into a desire of learning and knowledge, sometimes upon a natural curiosity and inquisitive appetite ; sometimes to entertain their minds with variety and delight ; sometimes for ornament and reputation ; and sometimes to enable them to victory of wit and contradiction; and most times for lucre and profession ; and seldom sincerely to give a true account of their gift of reason, to the benefit and use of men...
Page 243 - her beauty ; like the moon from the cloud of the " East. Loveliness was around her as light. Her " steps were like the music of songs.
Page 117 - Nature will not, nor cannot be defeated in her. purposes. The necessary mortality must come, in some form or other ; and the extirpation of one disease will only be the signal for the birth of another perhaps more fatal. We cannot lower the waters of misery by pressing them down in different places, which must necessarily make them rise somewhere else : the only way in which we can hope to effect our purpose is by drawing them off.
Page 117 - In a country which keeps its population at a certain standard, if the average number of marriages and births be given, it is evident that the average number of deaths will also be given ; and, to use Dr.
Page 194 - ... form, or belts of larger stones placed erect in the ground. Their general form is circular, but some examples are elliptical. Remains of habitations are in most cases found in these inclosures, so that we may justly conclude that they were originally constructed for purposes of security and defence. Grimspound is by far the finest and most extraordinary of all the relics of this class. Viewed from Hooknor tor, which commands its entire area, it presents to the spectator an object of singular...
Page 193 - One very perfect specimen is found in the corner of a very remarkable incloture, which is divided by irregular lines of upright stones. The hut is in a state comparatively perfect, the upper part only having fallen in. It appears to have been shaped like a beehive, the walls being formed of large stones and turf, so placed as to terminate in a point. These huts have their counterparts still extant in the shealings of the Orkneys, some of which, composed of stone and turf, have the form of ovens or...
Page 26 - Cocks-tor, and forms a ridge near the summit, where it comes into contact with the trapp. This ridge still preserves its laminar structure, but instead of its argillaceous aspect, has assumed that of flint, and gives fire under the hammer. In many places it is become ribband jasper.
Page 307 - I have seen the old birds feeding their young on the 2Oth of September, 1828, at Warleigh; and have been assured, by a good observer, that martins have frequently been seen flying during mild weather even in the Christmas week, at Plympton. These birds build in the hollows of the rocks under Wembury Cliffs, as well as about the houses in this neighbourhood.
Page 193 - ... in these the stones are set on their edge, and placed closely together, so as to form a secure foundation for the superstructure, whether that they were wattle,* turf, stone, or other material. These vestiges strikingly illustrate the descriptions which Diodorus Siculus and Strabo give of the habitations of the Britons of their times. The former describes them as "poor cottages constructed of wood and covered with straw ;" the latter as "wooden houses, circular in form, with lofty conical roofs.
Page 184 - They are straight on the plain, and never serpentine, one example only being slightly curvilinear. The stones are from two to four feet high, and are placed at irregular distances, but generally about three feet and a half apart. The terminating blocks are in most cases larger than the others, and the width of the avenue is about four feet and a half. Their general direction appears to be from the sacred circles to some neighbouring stream. 3. Rock Idols. — There are numerous examples of these...