333 
relating to the Construction of the Heavens . 
This conception is supported by the appearance of double 
nebulae, - - page 285, 
Their double appearance can be no deception, - 286 
Their nebulosity is derived from one common stock, 286 
This opinion is supported by the remarkable situation of 
nebulae, - - - 290 
Which may be seen in Mr. Bode's Atlas Coelestis, - 292 
The real form of the nebulous matter of which nebulae 
are composed may be inferred from their figure, 293, 
29b 295, 296. 
The form of the nebulous matter of round nebulae is gio~ 
bular, - 299 
This form is caused by gravitation, - - 299 
The central brightness of nebulae points out the seat of 
attraction, - 302 
The effect of attraction on the form of the nebulous matter 
depends on its original expansion, or the time of the 
action and on the quantity of the attracting matter, 302: 
Three different stages of condensation pointed out, 305 
Comets may be highly condensed nebulae, - - 306’ 
Progressive condensation takes place, - - 307 
Concentric brightness as well as globular form indicates 
the general gravitation of the nebulous matter, 308 
Progressive condensation may be seen in the formation 
of nuclei, - - - qo8 
Nebulous matter is probably capable of being consoli- 
dated ; the act of shining proves it to have chemical 
properties, - - - - - 309, 310 
It will stop light, and is partly opaque, - - 310 
Queries relating to the subsidence of the nebulous matter, 
the zodiacal light, and the cause of rotatory motion, 311 
