528 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
which I find to using the camera are avoided. The lighting is not inter- 
fered with, the image moves hut little, if any, with the movement of the 
head, and the image cannot be distorted. It is true that the accuracy 
of the figure depends on the skill of the artist, but a short trial of the 
method will satisfy most students that the actual variation of the drawing 
in symmetry from the image is less than that in figures made by the 
camera. 
The objection now existing that American makers have not on hand 
necessary slides will be gladly removed by them as soon as they see a 
demand.” 
Carl Zeiss-Stiftung in Jena. — The following notice is of interest: — 
“ By the present official notice the undermentioned firm has the 
honour to announce that their former proprietors, Dr. E. Abbe and Dr. 
R. Zeiss, have this day withdrawn from the firm, after having made over, 
according to agreement, the optical workshops in their entirety to the 
Carl Zeiss-Stiftung in Jena. The latter enters into all the rights, and 
accepts all the liabilities of the late proprietors. The firm itself 
remains unchanged. Dr. E. Abbe has been appointed by the Carl Zeiss- 
Stiftung as its authorized representative in all matters pertaining to the 
optical workshops, and to him, in conjunction with Dr. S. Czapski and 
Dr. 0. Schott, the whole internal and external management has been 
transferred. Power of procuration has been granted to the two last- 
named gentlemen. — Jena, July 1st, 1891. Carl Zeiss Optische Werk- 
statte. 
Extract from No. 153, 2. Juli, 1891 (2te Beilage) des * Deutschen 
Reichs- und Preussischen Staatsanzeigers.’ By a decree of His Royal 
Highness the Grand Duke, the undermentioned institution, inaugurated 
by deed of May 19, 1889, by Dr. Ernst Abbe, has been by law 
established, and received the right of legal personality. 
The objects of the Institution are : — (1) The cultivation of the 
branches of scientific industry which, by the efforts of the founder, 
have been established in Jena by the optical workshops of Carl Zeiss, 
and the glassworks of the firm of Schott and Genossen ; while at the 
same time attention is paid to the economical maintenance of those two 
establishments, and to the continued fulfilment of the social duties 
imposed upon the founders of the institution towards those who belong 
to it. (2) The advancement of mathematical and scientific studies by 
research and instruction. 
The institution bears for all time the name Carl Zeiss-Stiftung, ‘ in 
honour of the man who first laid the foundation for the above under- 
taking, and in lasting remembrance of his own peculiar merit in 
having in his field of work always aimed at the co-operation of science 
and technical skill.’ The management of the institution is by law 
transferred to the Kultusdepartement of the Grand Ducal Ministry of 
State ; its judicial seat is Jena. 
To the preceding public announcement must be added the fact that, 
after the Carl Zeiss-Stiftung had become the proprietor of the optical 
workshops of Carl Zeiss and co-proprietor of the glass technical 
laboratory of Schott and Genossen, (a) Dr. Ernst Abbe was appointed 
as authorized representative of the Carl Zeiss-Stiftung, with right of 
signing for the firm in all matters pertaining to these two establish- 
