MISCELLANEOUS. 1083 



10. Collector of atmospheric heat, with continuous indications, by Con. 

 Bellani. 



11. Psychrometer with continuous indications, by Con. Bellaui. 



12. Balance barometer, modified by Prof. Giovanni Cantoni. 



13. Normal barometer for Meteorological Stations, by Prof. Giovanni 

 Cantoni. 



14. Psychrometer with ventilator, by Prof. Giovanni Cantoni. 



15. Electric balance, by Prof. Giovanni Cantoni. 



16. Electric scale, for the measurement of electrical adherence. 



17. Maximum and minimum thermometer, by Prof. Giovanni Cantoni. 



18. Anemometrograph, by Prof. Parnisetti and Ferd. Brusotti. 



19. Modification of the machine of Attwood, by Ferdinand Brusotti. 



20. Hygrometer worked with sulphuric acid, improved by Brusotti. 



4565. Photographs of Scientific Instruments in the 



Royal Observatory of Palermo. Director, Prof. G. Cacciatorc. 



1. Great circle by Ramsden, 1790. The principal parts arc, first, a vertical 

 axis of conies, parallelepiped form, destined to support two graduated 

 circles, one for altitude, the other for azimuth. 2nd. The upper support of 

 this axis, formed of four columns with four arches, and a collar in the middle. 

 3rd. The lower support, composed of three circles placed horizontally one 

 on the other. 4th. A balustrade. 5th. An achromatic telescope. 6th. Three 

 microscopic micrometers, Avith other smaller pieces. (See annexed description 

 by Piazzi ) 



2. Catalogue of the stars made by circle No. 1. 



3. Equatorial, by Merz. (Aperture of object glass 9-665 inches.) Set up 

 in 1865. 



4. Spcctroscopic observations by the above equatorial. 



5. Seismograph of Niccolo Cacciatore, 1826. A circular receiver, per- 

 forated laterally in eight parts, indicating the four cardinal points, and the 

 intermediate points. Placed on a perfectly horizontal plane, and filled Avith 

 mercury which touches the holes, and which therefore can spill at the least 

 oscillation, and in the direction of the" oscillation. A corresponding number 

 of small cups placed below the holes to receive the spilt mercury, which 

 may afterwards be replaced. The mercury received in the cups indicates the 

 undulatory shocks of earthquake. 



6. Anemometer by Niccolo Cacciatorc, 1832. Attached is a description of 

 the instrument by the inventor. 



4567. Photograph of Registering Svapori meter, ac- 

 cording to the last plan adopted by the inventor, Prof. Ragona. 



Observatory of the Royal University of Modena ; Director, 

 Prof. Domenico Ragona. 



4568. Photographs of Scientific Instruments in the 



Cabinet of Physical Science of the University of Naples. 



Director, Prof. Giuliano Giordano. 



1. Fresnel lens used by Melloni in his researches upon radiant heat, in 

 particular Avith reference to the heat of the rays of the moon. 



2. Floating plummet, by Paolo Anania de Luca. 



3. A most accurate balance, by Bandini, machinist of the University, 

 resembling that of Steinheil, but much less costly. 



