Scientific Intelligence. 





Total. 



Syzigies. 





thesyzigi 



1843-1847 



1604 



850-48 



753-52 



96-96 



1848-1852 



2049 



1053-53 



995-47 



58-06 



1853-1857 



3018 



1534-13 



1483-87 



50-26 



1858-1862 



3140 



1602-99 



1537-41 



65-98 



1863-1867 



2845 



1463-42 



1381-58 



81-84 



1868-1872 



4593 





2259-52 



73-96 



1843-1872 



17249 



8838-03 



8410-97 



427-06 



yzigies. 



J also finds that of the reported earthquakes 

 1843 and 1872, 3,290 occurred at the moon's 



The reported earthquakes between 1751 and 1843 are shown 1 

 conform to the same rule — that is, a large preponderance of earth- 

 quakes about the syzi 

 Professor Perrey i 

 between the years' 1843 and 

 perigee and 3,015 at the apogee. 



11. Fossil Fishes of the Devonian of Tula, and Carboniferous 

 limestone of Mjatschkoim, Bnssia ; by H. Tbatjtschot.d (N. M6m. 

 Soc. Imp. Nat. Moscou, xiii, 263, 277.)— The Devonian fish re- 

 mains here described and figured include Hybodonts of the genus 

 Claclodus; Cestracionts of the genera Orodus, JSelodus, Psammo- 

 dvs; also species of Ctenacanthus. The Carboniferous limestone 

 has afforded the author the Illinois species, Cladodus lamnioides of 

 Newberry and Worthen : species of Helodns, Psammodus, Pcecilo- 

 diis, Cochliodus, Orodus, Solenodm, Petalodus, Bactylodns, (one 

 of Newberry and Worthen's genera), and Polyrhizodus ; besides 

 some fish-spines, of which one, Ostinaspis acuta, is Petrodus acntus 

 N. and W. 



12. On the occurrence of native Zinc. (Letter to one of the 

 Editors.)— Mr. W. D. Marks of Chattanooga, Tennessee, announces 

 the occurrence of fragments of metallic zinc in the soil along the 

 course of a vein intersecting the blue limestone of Sand Mountain, 

 in the northeastern comer of Alabama. The c' 



posed to indicate that the metal came originally from the adjoining 

 rock. Further than this, he states that pieces of metallic zinc have 

 been picked up along a range of thirty miles, over the Racoon Mts, 

 on the southern border of Tennessee, Sand Mt., and the northern 

 portions of Georgia and Alabama. The vein is now being explored, 

 and Mr. Marks hopes to find the zinc in place. 



13. Brookite. — Exact measurements made by vom Rath upon an 

 excellent crystal of brookite from Atliansk in the Urals show that 

 the mineral from this locality at least is not monoclinic, but ortho- 

 rhombic. E. s. B. 



14. On the Serpentines of Z&hlitz, Cheifendorf and Waldheim; 

 5RR in Dornat.— The chemical examination of the 



by J. Lembeeg in Dorpat. — The chemical . _ 

 serpentines, from the above mentioned localities in Saxony, by 

 Lemberg, has led to the conclusion that they have arisen from 

 the alteration of rocks consisting originally of chrysolite, garnet 

 and hornblende. An analogous conclusion has been reached by 

 other investigators for similar occurrences. In the case in hand 

 it is shown that the readily-decomposed chrysolite has been changed 



