This machine being rectified by the astronomical tables for any 
particular time, if the winch » be then turned from right to left, 
the machine will exhibit the vicissitudes of day and night, vari- 
ety of seasons, new and full moons, eclipses, anomalies of the 
sun and moon, or year after year. . 
As the earth has the same unequable motion in its elliptical 
orbit that the real earth has, this machine will show the sun’s 
true place correctly for a great length of time. 
A table showing the dimensions of the wheels of the Tellurium, number 
of teeth, ee. 
Wheel A, 293 teeth, 12 teeth in an inch of circum. Diam. 7.77 inches. 
» Wheel B, 80 teeth, 8 teeth in an inch of circum. Diam. 3.18 inches. 
Pinion of wheel B, 8 leaves. Diam. =4;)ths of an inch. 
Wheel p, 24 teeth, 8 teeth in an inch. Diam. ;,ths of an inch. 
_ Pinion C, 8 leaves. Diam. ;%)5ths of an inch. vs 
_ Wheel E, 167 teeth, 8 teeth in aninchof circum. Diam. 6.64 inches. 
Wheel O, 25 teeth, 8 teeth in an inch. Diam. ;88;ths of an inch. 
Wheel P, 72 teeth, 8 teeth in an inch. Diam. 2.86 inches, 
Wheel D, 36 teeth, 8 teeth in an inch. Diam. 1.43 inches. 
ie G, 20 teeth, 12 teeth in an inch of circum. Diam. 53,ths of 
an in 
Wheel F, 372 teeth, 12 teeth in an inch. Diam. 9.35, aan Ta 
~ Wheel I, 20 teeth, 8 teeth in an inch of circum, Diam. ;%,ths_of 
an inch. 
Wheel H, 177 teeth, 8 teeth in an inch. Diam. 7160 inches. 
‘Wheel 7, 40 teeth, 8 teeth in an inch. Diam. 1,8, inches. 
~ Elliptical wheels K and L. The longer diihidter ‘of each wheel, 10 
inches, Distance between the two foci =1;,ths ofan inch. Both of these 
wheels contain the same number of teeth. 
' Wheel M, 280 teeth, 8 teeth in an inch. Diam. 11544, inches. 
» Pinion N, 16 leaves. 
peBllip ical. grooves in the Sete 1. The longer diameter of each 
groove, measuring from the middle of the groove on one side to the 
middle of the groove on the opposite side, 10 inches. Distance be- 
tween the two foci ;yths of an inch. 
a s 4 ; ; : Etre 
Wire Raiey > sik gh aed ide's UG é ; a * 
