348 Fessenden's Stove. 



ing^ and the second a dead shell; and say the colors are always 

 much more fainter in the dead shells. When the shells have lain 

 long dead on the shores, they are subject to many injuries, of 

 which the being eaten by the sea worms is not the least; age ren- 

 ders the finest shells livid or dead in their colors. 



Besides the imperfections arising from age and sickness in the 

 fish, shells are subject to other deformities, such as morbid cavi- 

 ties, or protuberances, in parts where there should be none. When 

 the shell is valuable, these faults may be hid, and much added to 

 the beauty of the specimen, without at all injuring it as an object 

 of natural history, which should always be the great end of col- 

 lecting these things. The cavities may be filled up with mastic, 

 dissolved in spirit of wine, or with isinglass: these substances 

 must be either colored to the tinge of the shell, or else a pencil 

 dipped in water colors must finish them up to the resemblance of 

 the rest: and then the whole shell being rubbed over with gum 

 water, or %vith the white of ,an egg: s'carce any eye can perceive 

 the artifice; the same substances may also be used to repair the 

 battered edge of a shell, provided the pieces chipped off be not 

 too large. And when the excresences of a shell are faulty, they 

 are to be taken down with a fine file. If the lip of a shell be so 

 battered that it will not admit of repairing by any cement, the 

 whole must be filed down or ground on the wheel till it becomes 

 even. 



FESSENDEN'S STOVE. 



The principles of this invention consist in forming an easily 

 portable apparatus., which furnishes convenient modes of arresting 

 and detaining much of that heat produced by fire for warming 

 apartments, which in common stoves is suffered to escape through 

 the smoke pipe and chimney. This is effected by exposing as 

 large surfaces of water, inclosed in proper metallic vessels, as is 

 conveniently practicable to the action of the heat of the fire- 

 place, distributing the caloric, thus detained, within the apartment 

 to be warmed, and condensing and bringing to the boiler, the steam 

 thus arising, without the apparatus of valves, syphons, and so forth, 

 heretofore thought indispensable in heating by steam. 



The apparatus which constitutes my Steam and Hot-water 

 Stove consists of a hollow cylinder, standing perpendicularly on 



