PROCEEDINGS : 
~ AMERICAN PHILOSOPHICAL SOCIETY 
HELD AT PHILADELPHIA 
FOR PROMOTING USEFUL KNOWLEDGE 
mae Vou. XL.) ApRIL-May, 1903. No. 173. 
CONTENTS. 
Ben the Dependence of What Apparently Takes Place in Nature 
~ upon What Actually Occurs in the Universe of Real Ex- 
me » istences: By G. JOHNSTONE STONEY... 0... ccce tees ce ces 105 
| Hints on the Classification of the Arthropoda; the Group a Poly- 
_ phyletic One (with plate)... By Aupueus §. PACKARD....... 142 3 
ae ey. 5 ‘The Principle of.Least Work in Mechanics and Its Use in Investi- 
y gations Regarding the Ether of Space. By MANsFIELD 
ae Arh tn PDEA TENBOARG ten Seas Sls Sos Cojo sides «a sia otis Bee MMOs Ses eat 162 
1S The “Franklin Papers”. in the American Philosophical Society. 
AN Pee: ere EMME CHA TETIOM 5). in. aa \oy sein cee ea's's olayeeie els rs ees 165 
The Orbit of the Double Star ¥ 518. By Extc Dooxrrrue......... 170 
3 Some Aboriginal Languages of Queensland and Victoria. By R. H. 
iss MATHEWS.. Cy 3.18" od ES EO aE PRO BS OE caine RENE eA A 179 
rat A New Fresh- water Molluscan Faunule from the Cretaceous of 
A; Montana (with plate). By Timotay W. STANTON. 2/50 hy ¥ 188 
zt 
ost 4 sf Reaction as an Efficient Agenti in Procuring Deeper Navigable Chan- 
EROS Het nels in the Lerma yement of Rivers and Harbors. By Lewis 
ps IVa ERPs Sct nai 2's wad Soe algo ahah nga weal tta phocie ONS aD 199 - 
‘The Warfare against Tuberculosis. By Mazycxk P. Raveneu, M.D. 212 
On Artificial Production of Crystallized Domeykite, Algodonite, 
af Argentodomeykite and Stibiodomeykite (with plate), By 
Mer SINS MO AE ORDEORE GS oa. O's say thems bo vo. ¥ ny demted gM aae Saye Coe oe 219 
- Crystallographic Properties. By Frep. EUGENE WRIGHT....... 237 | 
Ke, "Languages of the New England Aborigines, New South Wales. 
ae Pie, ay MISHOER Sr 6s eee oe fede ce ple e's 249 
pet On. spe: Names (chiefly Linnean) of Animals and Plants Erro- 
Pkt i - neously Paired in Synonymy. By MarcuEsE ANTONIO DI 
Siege! PGBEGORIO ©. eine ce eee eee ete eee were e eens Bese AC. 
_Obittary Notices of Members Deceased: 
y Sone Miller Wilson, A.M., C.E. By Henry Ye Chee 
; PHILADELPHIA : 
THE AMERICAN PHILOSOPHICAL 
104 South Fifth Street. 
1903, 
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