OYSTER BIBLIOGRAPHY. 319 



1. The influence of the soil ui)oii the bioodiiij; and ^iiowth of oysters is comiilicnted by: 

 temperature, especially ilnrinj;- the spawning season ; sudden alternations of heal and cold 

 due to currents; alternation of dei)th of water, especially as regards whether the maxi- 

 miim of sun-heat and light concords with low water during the spawning season; 

 velocity of tide; angle of inclination of shore, etc. 



2. The soil of oyster-grounds may he made up of materials of any of the great classes 

 of rocks, arenaceous, argillaceous, or calcareous, provided they contain more or less of a 

 line flocculent highly hydrated silt, rich in organic matter, which indicates that Diato- 

 maceaj, Khizopoda, Infusoria, and other minute creatures abound. 



3. The character and abundance of such organisms in a locality seem to be the true test 

 of a successful oyster-ground. 



4. Although oysters do nndonbtedly assimilate copper from water where mine-water 

 containing traces of that metal flows into the sea in the neighborhood of the oyster beds, 

 the copper is chiefly, if not exclusively, contin', d to the body of the oyster, and does not. 

 appear to reach the mantle or beard. That the so-called green oysters of E.^sex, 

 Marennes, and other places, on the other hand, are green-beanled and contain no copper, 

 nor can the moat minute trace of copper be detected in the soil of the oyster-gi-nuiids 

 where such grecii-biarded oyMters are produceil. 



1871 a— Lord, J. Keast. Oysters. <Lei.snre Hour, London, September 16, 1N71, 



vol. -XX, pp. .581-582. 

 Discusses oyster st^asons from a gastronomical point of view. 



1871b — W , E. P. Oysters in Ireland. <Nature, London, December 14, 1871, 



vol. V, pp. 12S, 129. 

 A review uf 187U «. 



1872 a — Be tram, James Gr. Toncliing oy.sters. <]St. Paul's Magazine, London, 



1872. vol. 12. ))]). 47:"! et svq. 



1872b — Browne, Orris A. Report to the Auditor of Public Accounts on the Oyster 

 Bcd.s of Virginia. Riclimoud, 81icppersou & Graves, 1872. 8*^, 21 pp. 



A statement of tlie duties performed by the Virginia oyster inspector during the pre- 

 ceding year, with reference to the general condition of the oyster industry and recom- 

 mendations to the State Legislature. Also contains many extiacts from the " Report of the 

 commission appointed to inquire into the methods of oyster-culture in the United Kingdom 

 and France, with a view to the introduction of improved methods of cultivation of oysters 

 into Ireland," Hublin, 1870; and other papers. See 1877c. 



1872 c — Davidson, Hunter. Report on the Oyster Fisberies: Potomac River Shad 

 and Herring Fisheries, and the Water Fowl of Maryland to his Excellency 

 the Governor, and other Commissioners of the State (). P. J'orce, January 

 1, 1872. Annapolis, S. S. Mills, L. F. Colton &. Co., 1872. 8°, 48 pp. 



One of thi' most c-.>;uprelieusive of the early reports on the oyster industry of Maryland, 

 especially rich in statistical data. 



1872 d — Parliamentary Paper. Return of Particulars of all Inquiries and Exam- 

 inations Held by the Inspector Appointed by the Board of Trade under 

 " The Oyster and Mussel Fisheries Act, 1866," and " The Sea Fisheries Act, 

 1868,'' in Each Year 1868 to 1872; of the Names, Duties, and Salaries of 

 the Persons Employed, etc. London, 1872. 



1873a — Saunders, Silbert. Development of oyster spat. ^Quarterly Journal of 

 Microscopic Science, London, 1873, vol. xiii, pp. 439-440. 



Summary of a popular lecture delivered July 10, 1873, before the East Kent Natural 

 History Society. 



1873b— Timmons, William E. Report of the (.'ommander of the Oyster Fisheries 

 and Water-Fowl of Maryland, to his Excellency the Governor, and the 

 Commissioners of the State Oyster Police Force, .Tanuary 1, 1874. Annap- 

 olis, Wm. T. Iglehart & Co., 1873, 8°, 11 pp. 



Discusses the general condition of the oyster flshery of Maryland in 1873, with recom- 

 mendations for further legislation. 



