676 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
tion, and it is true that later researches have shown that many of his 
theories are untenable ; but the correct ideas which he was the first to 
enunciate have since borne fruit. For instance, he was the first to 
clearly explain the grounds for supposing that infectious matter could 
not be gaseous. 
In 1884, in spite of failing health, he succeeded in completing the 
great work of his life on the doctrine of descent, the c Mechanisch- 
physiologische Theorie der Abstammungslehre,’ which will ever remain 
as a monument to his powers as a scientific thinker. Naegeli’s principles 
differed widely from those of Darwin. Natural selection he was only 
able to recognize as a means for the removal of unsuitable forms. The 
production of new forms he ascribed to the principle of progression 
existing in the organism. To the microscopist our deceased Honorary 
Fellow was best known by the work on the Microscope which he pub- 
lished in conjunction with Prof. Schwendener, and which has passed 
through three editions in Germany and was translated into English. In 
the winter of 1889-90 Naegeli was prostrated by an attack of influenza, 
but recovered so far as to be able to go to the Riviera in the following 
winter. He died somewhat suddenly in May last. 
List of all Patents for Improving the Microscope issued in the 
United States from 1853 to 1830.* — The following list is of interest : — 
1853. H. De Riomonde: Otoscope. No. 9581. 
1861. E. P. Dagron: Photo charm. No. 33,031. 
1862. H. Craig: Charm. No. 34,409. 
1864. J. Ellis : Seed Microscope. No. 42,843. 
1865. Wales: Plain movable front to lens. No. 46,511. 
1865. J. J. Bausch : No. 47,382. 
1865. C. B. Richards : Friction wheels on rack motion. No. 47,860. 
1866. H. L. Smith: Side reflector above objective. No. 52,901. 
1866. Heath : Combined Microscope, telescope, and eye-glass. No. 
54,542. 
1866. R. B. Tolies: Binocular eye-piece. No. 56,125. 
1866. O. N. Chase: Seed glass. No. 56,178. 
1869. J. H. Logan : Dissecting Microscope. No. 93,895. 
1874. J. J. Bausch: Botanical Microscope. No. 151,746. 
1876. Wales’ pillar fine-adjustment. No. 178,391. 
1876. J. Zentmayer: Fine-adjustment carrying rack, swinging sub- 
stage. No. 181,120. 
1876. Gundlach: Fine-adjustment. No. 182,919. 
1877. Gundlach: Glass stage, sliding carrier. No. 198,607. 
1878. R. B. Tolies: Sector illuminator. No. 198,782. 
1878. R. B. Tolies: Swinging illumination tube. No. 198,783. 
1878. J. J. Bausch: Convex base to stand. No. 199,015. 
1879. Gundlach: Pillar tube. No. 211,507. 
1879. Gundlach: Eye-piece of field lens and triplet. No. 212,132. 
1879. H. G. Deal: Cloth-counter for bolting cloth. No. 214,283. 
1879. W. H. Bulloch: Swinging substage loose from mirror. No. 
215,878. 
* Amer. Mon. Micr. Journ., xi. (1890) pp. 280-1. 
