MECHANICS.
31
£ s. d.
Improved pocket globes, three inches . . .1116
Globes, mounted with moveable circles, for solving the various problems .....
Moveable planispheres ... 8s 6d. to 0 12 0
Single ditto . . . . . . 6s. to 0 16 0
Armillery sphere, eighteen inches diameter, wdth the
planets moving in the ecliptic . . . 63 0 0
Ditto, with the sun and moon to set to their place in
the ecliptic . . . . . . . 40 0 0
Ditto, twelve inches diameter . . . . 26 0 0
Ditto, nine inches diameter . • . . „ 15 15 6
Ditto, six inches diameter . . . . .660
Large orreries, made to order, shewing the motions of the planets in the ecliptic, with their satelites, the diurnal motion of the earth, age and phases of the moon, and eclipses . . £50 to 180 0 0
Ditto, arranged on five separate stands, shewing the motion of the planets, the annual and diurnal motion of the earth, the age and phases of the moon, the phenomena of eclipses, the earth and moon having their respective diameters, according to their distances, the immersion and emmersion of the satelites of Jupiter . 70 0 0
Ditto, the planetarium, telurium, and lunarium, separate, and on a brass stand . . . . 36 10 0
Ditto, the whole on one stand . . . . 20 0 0
Ditto, without the diurnal motion of the earth . .110 0
Ditto, the superior planets to move by hand, the earth
and inferior ones by wheelwork . . .10 0 0
Ditto, the superior and inferior planets, with the age
and phases of the moon . . . .880
Ditto, ditto, various . . . . £l 8s. to 6 6 0