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SUMMARY OF CURRENT RESEARCHES RELATING TO 
Classe III. Appareils pour la photomicrographs. — Microscopes 
speciaux. Ohambres photographiques diverses. Photomicrogrammes. 
Classe IV. Appareils divers. — Appareils binoculaires ajustables a 
volonte sur des microscopes quelconques. Revolvers ; adapteurs ; spec- 
troscopes-microspectrometres. Appareils de polarisation. Chambres 
claires : pour microscope vertical, pour microscope incline, pour micro- 
scope horizontal. Goniometres, lieniatimetres, chromometres. Cham- 
bres de culture (“ Growing-cells ”). Compresseurs. Platines a chariot 
independantes du microscope. Prismes redresseurs, oculaires redresseurs, 
oculaires binoculaires, oculaires stereoscopiques. Plaque de diffraction 
d’Abbe. Appareil a echauffer l’objet sous le microscope. Appareils divers 
non mentionnes. 
Classe V. Appareils de mensuration pour l’oculaire, pour la platine ; 
appareils de mensuration pour les couvre-objet. 
Classe VI. Microtomes. — A mouvements mecaniques, a main. Ap- 
pareil a diviser pour tracer les micrometres et les tests dites de Nobert. 
Classe VII. Appareils et accessoires pour les preparations micro- 
scopiques et les dissections. — Microscopes simples, doublets, loupes 
montees. 
Classe VIII. Preparations microscupiques. — Preparations de toute 
espece. Preparations simples. Preparations systematiques. Typen- 
Platten et Test-Platten. 
Classe IX. Appareils pour la bacteriologie. — £tuves a culture, 
l^tuves a temperatures basses et constantes. Etuves a steriliser par 
Pair sec et par la vapeur. Appareils pour la coagulation du sang. 
Appareils pour la sterilisation des serums. Boites pour desinfecter les 
instruments et pour steriliser les plaques a gelatine. Regulateurs pour 
la pression du gaz. Lampes inextinguibles et lampes se fermant 
automatiquement lorsque la flamme s’eteint. Appareils pour les 
recherches des microbes dans Pair et dans l’eau. Verrerie pour 
bacteriologie (ballons, tubes, billots, plaques, entonnoirs a eau chaude, 
crochets, etc.). 
Classe X. Ouvrages de microscopie. — Traites de micrographie. 
Ouvrages traitant de toutes les applications du microscope. 
Prof. Gilberto Govi. — He was born at Mantua in 1834, and was 
educated at Turin and Florence, subsequently taking the professorship 
of physics at the University of Naples. He died on 29th J une, 1889. 
At his funeral the President Brioschi, of the Accademia Reale dei 
Lincei, referred in high terms to the great capacity of Govi, and to his 
ardour in historical research in difficult points connected with scientific 
discovery. He was a frequent contributor to the transactions of the 
learned societies of Italy, and was particularly versed in the literature 
of electricity and optics. He made a special study of the labours of 
Volta, and threw much new light on the varied attainments of Leonardo 
da Vinci, to whose manuscripts he had access at the Biblioteca Ambro- 
siana of Milan. Govi’s contributions to microscopy, theoretical, 
practical, and historical, were numerous. Most of his devices were 
carried out in conjunction with M. Alfred Nachet, the optician, of Paris. 
His latest historical research was an elaborate paper communicated to 
the Reale Accademia dei Lincei, in which he sought to establish the 
invention of the compound Microscope by Galileo ; this paper we 
