makes it a point to keep in stock great numbers of small portable Aquaria 

 ready stocked, and with the balance of existence properly adjusted. 



Although from their nature the inhabitants of the ocean have a greater 

 interest than Fresh-water collections, the latter are duly provided and are 

 stocked with appropriate inhabitants, both vertebrate and invertebrate, many 

 of them with a view of more accurately observing the habits of those crea- 

 tures which have hitherto been only imperfectly preserved in cabinets, or 

 which, from their perishable nature, cannot be preserved at all, except in a 

 living state. "Various arrangements have also been adopted so as to com- 

 bine the Aqiiarium with methods of growing Ferns, Mosses, Lichens, &c., 

 and to fit them for the study of the habits, embryology, and development 

 of Semi- Aquatics, both animal and vegetable. A list of this department is in 

 preparation. 



The Tanks are constructed exclusively by the eminent firm (for whom 

 Mr. Lloyd is sole Agent) of Sandebs and Woolcott, Makers to the 

 Zoological Societies of London and Ireland ; to his Grace the Duke of Devon- 

 shire ; to the Eight Hon. Sir Robert Peel; and to various pubhc and private 

 collections throughout the kingdom. As at present improved, these are not 

 merely vessels for the reception of Plants and Animals, devised without 

 reference to a purpose ; for a long series of observations on the scientific 

 requirements demanded of them, has so perfected them, that they very 

 accurately imitate natural conditions by attention being paid to the direc- 

 tion, intensity, and colour of the light employed ; by the furnishing of 

 various depths and densities of the water, by the regulation of the tempera- 

 ture, and by the arrangement of the whole for special purposes. Nor has 

 external decoration been neglected. As complete and independent pieces 

 of furniture, many are made of ornamental woods, are mounted table-height, 

 and are placed on castors, for the facUity of being easily moved when full 

 to any part of the room or house, as the aspect of the sun or the time of the 

 year may demand. 



The wants of Microscopists are met by the preservation, for the use of 

 that class of observers, of such organisms (both living and dead) as are not 

 otherwise easily attainable. 



To render Mr. Lloyd's establishment as complete as possible, the literary 

 portion of the subject has received prominent notice, and aU the Books and 

 Periodicals in any way allied to it, are recognized as forming a portion of 

 the stock, and are laid upon the tables for the use of visitors, and for 

 purposes of sale. 



LIST. 



Eeal sea-water. 6d. per gallon. 



Marine salts, for the production of 

 artificial sea-water, — a pound makes 

 nearly three gallons. Is. per lb. 



Specific gravity test, for regulating 

 density of the water. Is. 



Thermometer for regulating tempera- 

 ture, with the bulb arranged for 

 constant immersion. 3s. 6d. 



Pocket magnifiers. ") 2s. 6d. 



Coddlington Lens. > to 



Stanhope Lens. J 12s. 6d. 



Gairdner's Microscope. 



Warington's Compound microscope, 

 arranged for viewing objects in an 

 Aquarium. 103s. 



Drip Glasses for aeration. 2s. 6d. 



Syringe for aeration. Is. 6d. 



Dipping tubes and spoons for the 

 removal of ofiensive matters. 6d. 

 to Is. 



Gutta percha and other siphons for 

 drawing oflF water without disturb- 

 ance. 3s. 6d. 



Stone travelling one- gallon jars with 

 top, packed in wicker, 3s. 6d. 



