686 REPORT—1868. 
Page in 
Pact Report I. Report II. 
88. Land and Freshwater Shells Bos aha she. TICUO. ke a. 
89. Polyzoa ... eH Ses ind WON ates 
91, 120. Fossil Species; U. 8. Expl. ‘Exp... se! fan peay BORmie ee OTD 
90, 92. Conclusion of First Report DOT se. 
93. Smithsonian Institution ; Collections and Publications... videlaibtes PROUT 
94. N. Pacific Exploring Expedition ; has ai Gould). sen ate eee IDS 
95. U.S. Japan Expedition; Jay... BEES dikes lc ii 
96. A. Adams; Ja ie oe) eepies DES 
97. Pacific Haoad I Depots "Blake's Fossils res 05, ake) Ree POOS 
98. - Gould’s Shells as #09) DOD) opesiy BOD 
ne % > Newberry’s Fossils ... oa% aed eles BeOO eS 
100. 5s . Antisell’s Fossils... ana aioe DROOL 
101. W. Cooper's Shells (Coop. sue abe Vee O00 
102. U. 8. N. Pacific “Boundary Survey ; Kennerley ... sisi A\bes (MOO 
103. Brit. ; Lord, Lyall, Forbes os» sites 603 
104. Californian State Geological Survey; J. G. PROORE (CP.) sep white tal OCG 
105. Cape St. Lucas Shells; Xantus ... san OLG 
106. Neeah Bay, Vancouver, &c.; Swan ues e5 tot sieht es BRODIT 
107. Farallone Islands ... 355 ae sists, (feeb, Mes BOOS 
108. J. G. Cooper’s Land Shells ; Bland... oo is6 rare gO2o 
109. Land Shells of Lower California wee eee 680 
110. Californian Naturalists: Trask, Newcomb, Rowell, Gabb, 
Remond ... : nat 5 ges ePODL 
111. Various American publications ee os», WeagiOon 
112. General Table of the Vancouver and Californian Fauna... ... 635 
113. Additional Shells from Lower California and the Gulf; 
Cerros Island, Margarita Bay, La Paz,Guaymas... ... ... 664 
114. Additional Shells of Tropical Fauna; Acapulco, Real 
Llejos, Panama aaa) “Yen s00S 
115. General List of Land, Freshwater, and “Marine Pulmo- 
nates; Binney ... ove. jaee 069 
116. Paludinide, &e: ; ; Binney ... ate os ae <'2ep ainveehgiis s MRO TAS 
117. Melaniadz ; Binney ~ ae +} a ais snese mare, 
118. Unionide; Lea... =r an 4 ue ear Rave 
119. Cyrenidx ; Prime . is nes a ak ond), heggg OPO LS 
91, 120. Tertiary Fossils... fa Ses ade 004, S07, os STO 
69, 121. Corrections of General Table |... 5 a vas, 200) destasDoo 
84, 122. Comparison with other Faunas ... 8 as 335 S02 dees SSO 
123. Local peculiarities ... 6 2a Fr ice), plese arenes L 
124. Comparative study of European Fauna ... ae Sox) ep eee een 
125. Comparison with Eastern American Fauna... eee ecto 
126. Comparison with the Crag Fossils ee oa sn) (boas pea satee EES 
127. Comparison with Asiatic Shells... a oe s") yh chs ene tED 
128. Peculiarities of the Island Fauna wee)” asm, | aE 
129. Comparison of the West Coast of N. and §. America ... ... ... 684 
130. Explanation of Nomenclature... oie) Pena Ge OSs 
Report on Steam-Boiler Explosions. 
By Professor Airy, F.R.S., Astronomer Royal. 
In considering the cause of the extensive mischief done by the bursting of a 
high-pressure steam-boiler, it is evident that the small quantity of steam 
contained in the steam-chamber has very little to do with it. That steam 
may immediately produce the rupture; but as soon as the rupture is made 
and some steam escapes, and the pressure on the water is diminished, a 
portion of the water is immediately converted into steam at a slightly lower 
temperature and lower pressure; and this in the same way is followed by 
4 ee 
