224 



♦ KNOWLEDGIi: ♦ 



[Apbil 13, 1883. 



30. Arnold ] 



4l>. Chrislii. Mnycr 



41. Jlotoii 



42. Enrt onion 

 4.3. Krorcsby 

 4i. (iiujn 



45. Harrow 



4G. Archytos 



47. Plana 



4S. Ma.son 



4!». Uaily 



60. Bnrg 



51. Mount Taurus 



i)2. Komer 



J53. Le Monnier 



54. Posidonins 



65. Littrow 



50. Maraldi 



57. A'itruviu.s 



58. Mount Argitnis 

 50. Macrobius 



<50. Proclus 

 .61. Pliny 

 62. Rosa 

 G3. Arago 

 C4. Kitter 



65. Sabine 



66. Jansen 



67. Maskelyne 



68. Meant Hsemns 



69. Promontorium 



Acherusia 



70. Menelaus 



71. Sulpirins GalUis 



72. Taquet 



73. Bessel 



74. Linne 



75. Mount Caucasus 



76. Calippus 



77. BndoxuB 



78. Aristotle 



79. Egede 



80. Alps 



81. Cassini 



82. Thea?tetu3 



83. Aristillns 



84. Autolycug 



85. Apennines 

 80. Aratus 



87. Mount Hadley 

 .88. Conon 

 89. J[ount Bradley 

 ■90. MountHuyghens 

 m. Marco Polo 



92. Jlount Wolf 



93. Hyginus 



94. Triesnecker 



95. Manilius 



96. Julius Csesar 



97. Sosigenes 

 D8. Boscovich 

 99. Dionysius 



100. Ariadicus 



101. Silberschlag 



102. Agrippa 



103. Godin 



104. Uhieticus 



105. Sommering 

 100. Schrotcr 



107. Bope 



108. Pallas 



109. Ukert 



1 10. Kratoathenes 



111. Stadius 



112. Copernicus 



1 13. Gambart 



114. Rcinhold 



115. Carpathean Mts 

 110. Gay Lussac 



117. Tobias Mayer 



118. Milichius 



119. Hortensius 



120. Archimedes 



121. Timooharis 



122. Lambert 



123. La lliro 



124. PythcM^< 



125. Ruler 

 120. Diophnntus 



127. Delislc 



128. Carlini 



129. Helicon 



130. Kirch 



131. Pico 



132. Plato 



133. Hariialu.q 



134. I,a I'l.nre 



135. lleraclides 

 13(5. Maujiertuis 



137. Condamine 



138. Bianchini 



139. Sharp 

 IRI. Mairan 



141. Louvillo 



142. Bouguer 



143. Kncke 

 141. Kc]iler 



145. Bepisarion 



146. Reiner 



147. Marius 



148. Aristarchus 



149. Herodotus 



150. Wollaston 



151. Lichtenberg 



152. Harding 



153. Lohrmann 

 1.54. HeTelius 



155. Cavalerius 



156. Galileo 



157. Cardan 



158. Krafft 



159. Olhen 



li'iO. Vasco de Gama 



161. Hercynian Mts. 



162. Seleucns 



163. Briggs 



164. Ulugh Beigh 



165. Lavoisier 



166. Gerard 



167. Repsold 



168. Anaxagoras 



169. Epigeiies 



170. Tima-HS 



171. Fontenelle 



172. Philolaus 



173. Anaxinienes 



174. Anaximander 



175. Horrcbow 



176. Pythagoras 



177. Q^iiopides 



178. Xenophanes 



179. Cleostratus 



180. Tycho 



181. Pictol 



182. Street 



183. Sasseridcs 



184. Hell 



185. Gauricu.s 

 180. Pitatus 



187. Hesiod 



188. Wurzelbauer 



189. Cichus 



190. Heinsius 



191. Wilhelm I. 



192. Longomontanus 



193. Clarius 



194. Deluc 



195. Maginus 

 190. Saus?ure 



197. Orontius 



198. Nasir-od-din 



199. Lexell 



200. Walter 



201. Regiomontanus 



202. Pnrbaeb 



203. Thebit 



204. Arzachol 



205. Alpetragius 



206. Promontorium 



.^Cnariuni 



207. Alphonsus 



208. Ptolemy 



209. Davy 



210. Lalande 



211. Mosting 



212. Horschel 



213. BuUialdus 



214. Kios 



215. Guoricke 



216. Lubiniezky 



217. Parry 



218. Bonpland 



219. Fra Mauro 



220. Riphocan Mts. 



221. Euclid 



222. Landsberg 



223. Flamsteed 

 221. Letronno 

 225. Hippalus 

 220. Campanus 



227. Mercator 



228. Ramsden 



229. Vitello 



230. Doppelmeyer 



231. Mersenne 



232. Gassendi 



233. Agatliarchides 



234. Schiller 



235. Bayer 



236. Rost 



237. Hainzel 



238. Capuauus 



239. Schickard 

 210. Drebbel 



241. Lehmann 



242. Phocylides 



243. Wargenlin 



244. Inghirami 

 215. Bailly 



246. Dorfel Mts. 



247. Hausen 



248. Segner 



249. Weigel 



250. Zuchius 



251. Bettinus 



252. Kircher 



253. Wilson 



254. Casatus 



255. Klaproth 



256. Newton 



257. Cabeus 



258. Malapert 



259. Leibnitz Mts. 



260. Blancanus 



261. Scheiner 



262. Moretus 



263. Short 



264. Cysatns 



265. Gruembergor 



266. Billy 



267. Hansteen 



268. Zupus 

 209. Fontana 



270. Sirsalis 



271. Damoisean 



272. Grimaldi 



273. Kiccioli 

 271. Cordilleras 

 275. IVAlembert Mts 

 270. Rook Mts. 



277. Rocca 



278. Criiger 



279. Borgius 



280. Eichstadt 



281. Lagrange 



282. Piazzi 



283. Bouvard 



284. Vieta 



285. Fourier 

 280. Cavendish 



287. Roaumur 



288. llipparchus 



289. AlbategniHS 



290. Parrot 



291. Airv 



292. La Caille 



293. I'layfair 

 291. ApianuH 



295. Werner 



296. Aliacensis 



297. Thooii pen. 



298. Theon jnn. 



299. Taylor 



300. Alfragimus 



301. Dclambro 



302. Kant 



303. Dollond 



304. Dps Cartes 



305. Abulfeda 

 300. Almamon 



307. Tacitus 



308. Geber 



309. Azophi 



310. Abenezra 



311. Pontanus 



312. Sacrobosco 



313. Pons 



314. Fcrmat 



315. -Altai Mts. 

 310. Polybius 



317. Hypatia 



318. Torricelli 



319. Theophilus 



320. Cyrillus 



321. Catherine 



322. Beaumont 



323. Isidore 

 321. Capclla 

 325. Censorinus 

 320. Taruntius 



327. 



328. 

 1329. 



330. 

 1331. 

 ; 332. 

 ! 333. 



334. 



335. 



330. 



337. 



338. 



339. 



340. 

 !34I. 

 ! 342. 

 I 343. 



344. 



345. 



310. 



347. 



34S. 



349. 



350. 



351. 



352. 



353. 

 354. 

 335. 

 356. 

 357. 

 3 -.8. 

 359. 

 360. 

 361. 

 362 

 363 



Messier 



Goclcniua 



Biot 



Guttombcrg 



Pyrenees 



Bohnenlxjrger 



Colombo 



Magelliaens 



Cook 



Santbech 



Borda 



Langrenus 



Vendelinns 



Petavius 



Paltizsch 



Hase 



Snell 



Stevinus 



Furner 



Maclauriu 



Kastner 



La Perouse 



Ansgarins 



Behaim 



Hecata;ns 



Wilhelm Hut 



boldt 

 Legendre 

 Stofler 

 LicetuB 

 Cuvier 

 Clairant 

 Maurolycus 

 Barocius 

 Bacon 

 Buch 

 Biisching 

 Gemma i-'risius 



36'!. Poisson 



365. Nonius 



366. Femelius 



367. Riccius 



368. Uabbi Leri 

 309. Zagat 

 370. Lindenan 



i 371. Piccolomini 

 ■ 372. Fmcastorios 

 I 373. Neander 



374. Stiborius 



375. Reichenbach 



376. Rheita 



377. Fninnhofer 

 ; 378. Vega 



I 379. Marinns 



380. Oken 



381. Pontecoulant 



382. Ilanno 



383. Fabricins 



384. Jletius 



385. Steiuheil 



386. Pitiscus 



387. Hommel 

 38'*. Vlacq 



389. Bosenberger 



390. Nearchus 



391. Hagecius 



392. Biela 



393. Nicolai 



394. Lilly 



395. Jacobi 



396. Zach 



397. Schomberger 



398. Bognslawski 



399. Boussingaulc 



400. Mutns 



The beginner with the telescope who has read or heard of 

 " mountains " in the moon, and who takes his lirst look at 

 our satellite with a view of examining them, will certainly 

 he puzzled i)y the spectacle presented to his gaze. If we 

 suppose the moon to be five or six days old, and that he is 

 regarding her southern horn (or upper one, as seen in the 

 telescope), he will be struck by the fact that it seems to 

 lie completely honeycombed by circular or elliptical holes, 

 surrounded by ridges, their walls breaking into each other, 

 and the depressions themselves being confluent in all direc- 

 tions. A little thought and attention will reveal the fact 

 that these are volcanic craters on the plains, surrounded 

 by cliffs, with, in many cases, conical hills rising from their 

 centres, which we are viewing from above, as though, in 

 fact, we were looking down upon them from the car of a 

 balloon suspended at a tremendous height above them. In 

 the case of those close to the terminator, the sun is just 

 rising, and their depressed plains or cup-shaped interiors 

 are still plunged in the blackness of night ; while the more 

 elevated cliffs surrounding them have already caught the 

 sun's rays, and stand prominently out of the darkness. 

 The words "blackness of night," which we have just used 

 are peculiarly appropriate in the case of the moon, inas- 

 much as, from her absence of atmosphere, light is not 

 scattered, as it is upon the earth, and everything that is not 

 in brilliant sunshine is in total darkness. The observant 

 student may possibly demur to this statement when he 

 notices that, close tothet€rminator,the lightfades gradually; 

 but he must bear in mind that the sun is rising very slowly 

 at this part of the moon's surface, and that only a small 

 portion of his disc is above the horizon there.* One not- 

 able eflect of tlie absence of air, and the consequent brilliant 

 lights and jet black shadows on our satellite, is, that tele- 

 scopic power tells upon her surface to an extent incom- 

 parably greater than it does in the case of any other body 



[* Besides, the sun's rays fall aslant on that part'of the moon's 

 surface. — R. P.] 



