VOL. XII.] PHILOSOPHICAL TRANSACTION*. 405 



Description of a curious Celestial Globe, showing the apparent Motions, from East 

 to fVest, and from JVest to East, of the Sun, Moon, and fixed Stars. Made 

 by M. Didier LAlleman, Watchmaker at Paris. N° 136, p. 905. 



The size of this globe is only of 4 inches diameter. The body is of bur- 

 nished steel, where all the figures of the constellations are designed in silver- 

 colour, but the stars themselves of all magnitudes are put on in embossed gold. 

 The circles of the longitude of the stars which separate the signs, and which 

 come from the poles of the Zodiac, are marked by gold- wires ; as also the 

 equator, the tropics, and the poplar circles. 



This globe moves from east to west in 24 hours ; showing the sun exactly 

 to rise and set as in the great world; also the moon, with the stars of the con- 

 stellations ; likewise how the sun of this globe comes to his meridian, with an 

 admirable regularity. Here also it is seen, that every day the sun sensibly 

 passes one degree from west to east, which is its own proper motion finished 

 by him in a year, and thereby describing to us the inequality of days and nights. 

 Also every day the mean motion of the moon from west to east, how she 

 increases according as she removes from the sun, so tliat it shows visibly the 

 first quarter of the moon, the end of the second quarter, which is the full; 

 then the third quarter which is the last quadrature; and lastly, her conjunction 

 with the sun. And thus she is seen to finish every month her synodical 

 course; and by her diurnal motion of 24 hours she shows the flux and reflux 

 of the sea, or high and low water. 



The meridian serves for a needle, to show the hours which are marked on 

 the Zodiac, where the sun moves regularly, which has two main rays, one 

 going directly northward, the other southward. That of the north marks 

 the way or degree which the sun makes from west to east, on the signs of 

 the Zodiac, and on a circle of silver, where the 36o degrees of the circle are 

 marked. The other ray, of the south, marks on another circle of silver the 

 days of the month, where the 365 days are noted. 



This Globe may generally serve for the whole world, as it can be put to all 

 the elevations of the pole. There is but one great spring, the primum mobile, 

 which puts all the rest in motion. It is wound up by the antarctic- pole ; and 

 by the arctic-pole, the movement may be accelerated or retarded. 



A Description of the Diamond Mines, as it was presented by the Earl Marshal of 

 England, to the Royal Society. N° 136, p. QoT . 



The parts of the world containing diamonds, are the island Borneo, and the 

 continent of India on both sides the Ganges : Pegu is reported to have several 



