118 L. CASELLA'S CATALOGUE 



, Sections of limestones from Bath, Bristol, East Indies, West Indies, Germany, Italy, 

 Ireland, Lancashire, etc. 



Transverse and longitudinal sections of Fossil wood from Australia, Antigua, 

 Bristol, Cromer, Dudley, East Indies, West Indies, Egypt, Folkstone, Isle of Portland, 

 Isle of Sheppey, Isle of Wight, and other parts of England. 



Sections of Flint, containing ammonites, sponge, etc. 

 Transverse and vertical sections of Bone, various. 



Scales of Fishes, various. Sections for the Polariscope. Alabaster, English and 

 Italian Agate. Ammonites, Brighton Pebble, black and white Marble, Granite, 

 various, Labrador and other Spar. 



1332. Human Bone, a set of twelve slides, illustrating its growth and structure, each 



016 



1333. UEINABY DEPOSITS, set of twelve, each slide . . . 016 



1334. INJECTED PKEPAEATIONS, and other animal tissues, each slide . 019 



1335. KECENT AND FOSSIL BONES of mammals, reptiles, birds, and fishes, transverse 



and vertical sections, each slide . . . . 013 



1336. Recent and Fossil Teeth, transverse and vertical sections, each slide 013 



1337. BLOOD Discs, pigment cells, skin, etc., each slide . . 013 



1339. BLOOD Discs Syren and lepidosyren . . . . 019 



1340. SPICULES AND GEMMULES of sponges and gorgonias, each slide 013 



1342. Shells, sections of various species of, each slide. . . 013 



1343. ECHINI SPINES, sections of, in great variety, each slide. . 013 



1344. Entomological Preparations antennae, eyes, feet, hairs, scales, skins, spiracles, 



stings, stomachs, tongues, tracheae, wings, acari, and parasites, each slide 



013 



1345. Vegetable Preparations sections of woods, petals, siliceous cuticles, spiral and 



other vessels, ducts, spores, pollens, hairs, etc., each slide . 1 3 



1346. Fossil Woods, sections of various exogenous and endogenous woods, each 008 



1347. COAL, sections of (many varieties), each slide . . ^ 008 



TELESCOPES. 



In the following list care has been taken to represent the several telescopes, with 

 their powers and capabilities, precisely as they will prove to the purchaser. 



The fabulous descriptions so often put forward are strictly avoided, so that intending 

 purchasers may see from the description given, the exact article they intend to have, 

 being assured that any statement made in its favour will be # amply justified by the 

 result. In first trying a telescope attention should be given to the difference between 

 a heavy or dull atmosphere and that of a bright and clear one, as in viewing a clock 

 or signal at four miles' distance under the former condition, it would not show so well 

 aS at twelve miles, or even greater distance under the influence of a light and clear 

 atmosphere. 



