INDUSTRY and KATIE.--To preserve seaweed, gather specimens that are growing to rocks in preference to those floating on the water, and lay them in a shallow pan filled with clean salt water. Insert a piece of writing-paper under the seaweed and lift it out of the bath; spread out the plant with a camel's-hair pencil in a natural form, and slant the paper to allow the water to run off; then press between two pieces of board, lay on one of them two sheets of blotting-paper, then the seaweed, and over the latter a piece of fine cambric, over that the blotting-paper, and lastly the second piece of board; replace the cambric and blotting-paper daily, and when the seaweed is quite dry brush over the coarser kinds with spirits of turpentine, in which three small lumps of gum-mastic have been dissolved by shaking in a warm place. Two-thirds of a small phial is the proper proportion. This mixture helps to retain the colour of the specimens. ELLA and HELIOTROPE.--Painting carefully with muriatic acid will remove the rough coating outside shells and show the mother o' pearl beneath it. They should be frequently dipped in water to remove the burning acid, or it will make holes in the shell. To polish them, dip a rag in hydrochloric acid and rub till clean; then dry in hot sawdust and polish with chamois leather. To paint shells with oil-colours, mix the latter with Siccatif de Courtrai, or with mirrorine, and put on the paints very dry. To paint them with water colours, lay a wash of white of egg over them; mix the paints with Chinese white and white of egg. The best effects are produced with oil colours. DAISY.--We make no distinction between persons who write to us, whether in service or out of it. We have an enormous correspondence, and very little space is devoted to it. Thus, many correspondents have to wait long for their answers. A good cashmere would suit very well for a wedding dress. Get one that will be of service to you afterwards. If you live in London it should not be very light. Your bonnet could be trimmed with white ribbon. CHRISTIE.--Try laying on a wash of white of egg before painting in water-colours upon black cardboard. This will remove the greasiness of the surface. Then lay on a wash of Chinese white, and paint in the ordinary manner. MISCELLANEOUS. FINANCIER.--We consider that to wash with hot water is not bad for you, but should be supplemented by a good rubbing (performed very quickly) with a wet towel all over the body. This will cause a healthy reaction. But the morning is really the best time. "Sesame and Lilies" and "Stones of Venice" are good books to read (of Ruskin's). There is a "Dictionary of English Literature," published by Cassell and Co., which might be useful to you. MEMORY.--We hear that many people have derived much benefit from the memory systems, and "Stokes on Memory" is a well-known book.