SEA ANIJ ATMOSPHERE ANO LIGHT. 40.3 
instrument passing onwards, as it were, through 
^ series of experimental changes, from more 
Simple into more complex forms ; it was created 
the very first, in the fulness of perfect adap- 
tation to the uses and condition of the class of 
creatures, to which this kind of eye has ever 
^cen, and is still appropriate. 
If we should discover a microscope, or teles- 
in the hand of an Egyptian Mummy, or 
beneath the ruins of Herculaneum, it would be 
impossible to deny that a knowledge of the prin- 
ciples of Optics existed, in the mind by which 
®iich an instrument had been contrived. The 
Same inference follows, but with cumulative force, 
i^hen Ave see nearly four hundred microscopic 
ienses set side by side, in the compound eye of a 
fossil Trilobite ; and the weight of the argument 
is multiplied a thousand fold, wdien we look 
the infinite variety of adaptations by which 
similar instruments have been modified, through 
cadless genera and species, from the long-lost 
^rilobites, of the Transition strata, through the 
extinct Crustaceans of the Secondary and Ter- 
tiary formations, and thence onwards throughout 
existing Crustaceans, and the countless hosts of 
iiving Insects. 
It appears impossible to resist the conclusions 
as to Unity of Design in a common Author, 
^iiich are thus attested by such cumulative evi- 
"lences of Creative Intelligence and Power; 
