PnOTOGRAPHICAL SeCTIOK PROCEEDINGS. 1113 



upward flow and guide the filtered stream to a definite point below 

 lyj the elongation of one side of the discharge tul5e. 



Mr. C. W. Hull exhibited and explained the action of an inverted 

 filter invented by Mr. V. M. Griswold. He also exhibited a series of 

 very' fine photographs made by Mr. Kriigher. 



Mr. John B. Gardner called attention to the difliculty of mounting 

 prints on lithographed tints. 



Mr. H. T. Anthony suggested the use of some weak alkali to 

 <jounteract the greasy effect of the lithogi'aphic ink. 



Mr. D. C. Chapman stated that he had found it advantageous to use 

 a small quantity of aqua ammonia in the starch with which he mounted 

 prints. It prevents fermentation and increases its adhesive property. 



Mr. J. B. Gardner exhibited a negative on which a portion of the 

 -varnish had exfoliated. Several members spoke of their experience 

 in like instances, and they believed that the peculiar effect was pro- 

 duced by moisture on the plate or in the film of collodion. It was 

 also suggested that it might be the result of something in the com- 

 position of the glass. 



Mr. W. Kurtz exhibited several very fine imperial photographs ; 

 also, an enameled pkotograph on porcelain, bearing date February, 

 1869, He explained his method of producing the result, which he 

 hoped to further illustrate at a future meeting. He also presented 

 three imperial card photographs for the cabinet. 



Mr. C. W. Hull spoke of the great utility of a process like that of 

 Mr. Kurtz. 



Mr. O. G, Mason spoke of its adaptability to the decoration of 

 dishes for the dining table, with family portraits and historic scenes. 



Spirit Photographs. 

 Mr. Mason also gave an account of a recent visit which he had 

 jaade to the establishment of one Mumbler, who claims the wonder- 

 ful power of commanding the presence of disembodied spirits, and 

 therefrom producing a picture in connection with that of a sitter in 

 the corporeal form. Mr. Mason exhibited several of the so-called 

 spirit photographs, in which the same spiritual individual had per- 

 sonated the dej)arted relative of several persons who were unable to 

 trace any other bond of consanguinity. In one case the so-called 

 spirit, a grandmother who had so kindly appeared at the summons 

 of Mumbler, was proved to yet inhabit flesh and blood, in the form 

 of a someM'hat ancient lady, who emphatically, denied ever having 



