150 



SCIENCE. 



[Vol. II., No. 26. 



aderat de Cassinius. ... [A description of the ball 

 and the ring as seen by the observer here follows, 

 and succeeding the words] quod a Josepho Campano 

 jam olim observatum, ut figura ab ipso edita com- 

 probat. . . ." When Huygens made this observation, 

 Cassini was with him; but, from the notice in the 

 Philosophical transactions, it is probable that Cassini 

 saw the division of the ring in August or September, 

 1675 ; so that there is no sufficient ground to think 

 that it was Huygens who showed the division to 

 Cassini. But with regard to the allusion of Huygens 

 to the observation of the two parts of the ring, made 

 by Campani, and the figure of the same which he had 

 published. Dr. Bakhuyzen searched in vain in differ- 

 ent books for the figure until he found, between a 

 number of letters addressed to Huygens from Leopold, 

 Prince of Etruria (the same to whom Huygens dedi- 

 cated his 'Systema Saturnium'), a sheet of paper 

 with two printe'd drawings of Saturn and Jupiter. 

 The details in the belts of the latter planet show that 

 Camjiani's telescope was a very good one. The 

 shadow of the ring is to be seen on the disk of 

 Saturn; and the outer part of the ring, for somewhat 

 less than half the total breadth, is dotted, whilst the 

 inner part is bright. There is no line between the 

 two parts, but they are distinctly separated from one 

 another by the difference in brightness. One can 

 also see traces of the inner dark ring. It is highly 

 probable that the above words of Huygens refer to 

 this figure of Saturn; and Dr. Bakhuyzen therefore 

 concludes that Joseph Campani was the first astron- 

 omer who, by means of a very good telescope made 

 by himself, saw distinctly the darker and the brighter 

 part of the ring in 1664. It is, however, possible that 

 Cassini was the first who saw the line of separa- 

 tion. The drawings of Saturn and Jupiter made 

 by Campani are printed in ' Stanislai Lubiensecii de 

 Lubienietz Theatrum Cometicum,' Pars prior, page 

 574. Lubienietz received the drawings from Athana- 

 sius Kircher in Rome. 



— The proprietors of the Ilelbourne age have sent 

 an exploring expedition to New Guinea. 



— In the Proceedings of the American philosophical 

 society (xx. no. 11.3) Professor Pliny Earle Chase has 

 along paper, thirty-three pages', on 'photodynaraics,' 

 in which, starting with 'combined cometary harmon- 

 ics,' he comes out at ' lines of force and of motion ; ' 

 and Professor George F. Barker gives an account of 

 his very simple form of constant battery. 



— The aeronautical exhibition was held in Paris, at 

 the Palais du Trocad^ro, from June 5 to 24, — one 

 week longer than was the intention. There were 

 a number of plans for flying-machines shown, but a 

 strange lack of successful results. 



RECENT BOOKS AND PAMPHLETS. 



*** Continuations and brief papera extracted from serial 

 literature without repagination are not included in this list. 

 Exceptions are made for annual reports of American i?isti- 

 tuiions, newli/ established periodicals, and memoirs of con- 

 siderable extent. 



Adams, B. C. Evolutiou ; a summary of evidence : a lecture 

 delivered in Montreal, March, 1SS3. New York, Putnam, 1883. 

 44 p. 12°. 



Amsterdam. — Wiskundig genuotschap. Catalogue der 

 bibliotheek. Amstevclam, .Sit/ten, 1883. 8+112 p. 8°. 

 Beguyer de Chancourtois. Questions dc g^ologle 



eynthetique; etudes, documents ct modeles exposes ^Texpusition 

 de 1883 it Madrid. Paris, impr. nal., 1883. 27 p. 8°. 



Bentley, R. The student's guide to structural, morphologi- 

 cal, and physiological botany. London, Churchill, 1883. '490 p. 

 12°. 



Bernard, G. Champignons observes it La Rochelle et dans 

 les environs. Paris, Bailtiire, 1883. 300 p., 56 pi., atlas. 8°. 



Boulnois, H. P. The municipal and sanitary engineer's 

 handbook. London, Spon, 1883. 398 p. 8°. 



Boussinesq, J. Cours d'analyse intinit^simale de I'lnstitute 

 industriel du Nord. Lille, Danel, 1883. 28+254 p. 4°. 



Carr, H. Our domestic poisons; or the poisonous elfecta of 

 certain dyes and colors (especially those coutaining arsenic) used 

 in domestic fabrics. London, /I'irf^wJrty, 1883. 47 p. 8°. 



Carton. Solutions raisonn^es des exercises de georaetrie 

 contenus dans les deux cuurs de M. I'abbe Carton, prot'esseur de 

 matheraatiquesil I'institution Notre-Dame a 'Valenciennes. Paris, 

 Poussielgue, 1883. 312 p. 12°. 



Casse, E. Aerostation pratique; ^pure et construction des 

 aerostats et montgolli^ree, avec quatre planches explicatives. 

 Paris, Ilennuyer, 1883. 41 p. 8°. 



Crie, L. Cours de botanique : organograpbie et families na- 

 turelles pour ia classe de quatrieme, les ecoles normales et K'^ 

 ecoles d'agrieulture. Paris, iJoin, 1883. 12+481 p., 805 fig. 18". 



Daguillon. Entre vignerons ii la veillee, causeries sur !a 

 culture de la vigne, la vinilication et la conservation du vin. 

 Clermont-Ferrand, impr. Mont-Loxtis, 1883. 463 p. 18°. 



Davy, &. Tout par I'electricitd. Tours, Mame, 1883. 475 

 p. 8°. 



Dubois, A. Histoire Daturelle vulgarisee, ornitbologte 

 populaire; grand et petite rapaces, oiseaux chasseurs. Limo- 

 ges, Barboii, 1883. 12-t p. 12^ 



The fiame. Oiseaux fautastiques et oiseaux chasseurs. 



Limoges, Barbott, 1883. J2o p. 12°. 



Duclau, S. La science populaire: les ballons et les pre- 

 miers voyagers aeriens. Limoges, Ardant, 1S83. 143 p. 12 . 



Fontannes.F. N'otesurladecouverted'unUnio plisse dans 

 le miocene du Portugal. Paris. Savy, 1883. 24 p., pi. 8°. 



Graeff, A. Traite d'hydraulique, precede d'une introduction 

 eur les principes generaux de la raecanique. 3 vol. torn. i. ; 

 partie theorique, 8-'-333 p.; tom. ii. : partie pratique, 541 p.; 

 tora.iii. : tables nuraeriques, notes, errata, planches, 52 p. Paris, 

 impr. nat., 1883. illustr. 4°. 



Herrick, C. L. Types of animal life, selected for laboratory 

 use in inland districts, pt. i. : Artbropoda. Minneapolis, 

 Kiinball pr., 18SZ. 33p., [7jpl. S°. 



Holmes, A. Bromley. Practical electric lighting. Kew 

 Torii, Spony 1883. 154 p., illustr. 8°. 



Johnston's new map of South Africa, -with index. London, 

 Johnston, 1S83. 



Lalande, J. de. Tables de logaritbraes pour les nombres 

 et pour les sinus. Revues par le baron Reynaud. Edition ste- 

 reotype, augmentee de forraules pour la resolution des ti'iangles, 

 par M. Bailleul, typograpbe, et d'une nouvelle introduciion. 

 Paris, Gauthier-Villars, 1883. 42+236 p. 16*. 



Lambert, J. The germ theory of disease concisely and 

 simply explained. London, BailUere, 1883. illustr. 



Lyras de Moleon. La mer, descrmtion de ses merveilles, 

 ses curiosites les plus remarquables. Limoges, Ardant, 1883. 

 144 p. 12°. 



Martin and "Watson. Handbook to the fernery and aqua- 

 rium. London, I'nioin, 1883. illustr. 



Mascart, E., and Joubert, J. A treatise on electricity 

 and masuetism. Translated by E.Atkinson, vol. i. Loudon, 

 De la Hue, 1883. 662 p. 8°. 



Oliver, J. A. W. Sunspottery ; or, What do we owe to the 

 sun ? A popular examination on the cycle theory of the weather, 

 famines, pestilences, commercial panics, etc. London, Simpkin, 

 1883. 54 p. 8°. 



^ des raorts des anciens Egyptiens. Tra- 

 I le papyrus de Turin et les manuecrits 

 ! de notes et suivie d*un index alpbabe- 

 tique. Paris, Leroux, 1882. 9+665 p. 18°. 



Simmonds, P. L. A dictionary of useful animals and their 

 produ(^ts : a manual of ready reference for all those which are 

 commercially important, and others which man has utilized; in- 

 cluding also a glossary of trade and technical terms connected 

 therewith. London, Spon, 1883. 136 p. 12". 



Woolcock;, J. Studies in anthropology; or, lectures on 

 man. London, Partridge, 1883. 



Pierret.P. Le livi 

 duction complete d'apn 



