Nov. 16, 1882 | 
NATURE 
61 
Our engraving will give an idea‘of the arrangement and 
the effect produced. By a modification of the “lampa- 
scope,” M. Reynaud, the inventor, obtains by means of 
an ordinary lamp, at once the projection of the scene or 
background—by the object-glass which is seen at the side 
of the lantern—and of the subject, by another object- 
glass which is shown in front of and alittle above the same 
Jantern, 
subject are drawn and coloured on glass, and are con- 
nected in a continuous band by means of any suit- 
able material. One of these flexible bands is placed in 
the wide crown of the praxinoscope, which is pierced 
with openings corresponding to the phases of the subject. 
To understand the course of the luminous rays which go 
to form the image, it is necessary to bear in mind the 
For this, the positions or phases which form a | condensing lens which, placed near the flame of the lamp, 
“i LWA 
Daly 
M. Reynauc’s new projection-praxinoscope. 
is not visible in the figure ; then a plane mirror inclined 
45°, which reflects the rays and causes them to traverse 
the figures filling the openings of the crown. These rays, 
reflected once more by the facets of the prism of mirrors, 
finally enter the object-glass, which transforms the verti- 
cal central image into a real image magnified on the 
screen. In making the two parts of the apparatus con- 
verge slightly, the animated subject is brought into the 
middle of the background, where it then appears to 
gambol. A hand-lever on the foot of the instrument 
allows a moderate and regular rotation to be communi- 
cated. This apparatus, with an ordinary moderator lamp, 
supplies well-lighted pictures and curious effects. It 
enables us to obtain, with the greatest ease, animated 
projections, without requiring any special source of light, 
by simply utilising the lamp in daily use. 
NOTES 
We take the following from the 7imes :—The council of the 
Royal Society have awarded the medals in their gift for the 
present year as follows: The Copley Medal to Prof. Cayley, 
F.R.S., for his researches in pure mathematics ; the Rumford | 
Medal to Capt. Abney, F.R.S., for his photographic researches 
and his discovery of the method of photographing the less 
refrangible part of the spectrum, especially the infra-red region ; 
a royal medal to Prof. W. H. Flower, F.R.S., for his contribu- 
tions to the morphology and classification of the mammalia and 
to anthropology ; and a royal medal to Lord Rayleigh, F.R.S., 
for his papers in mathematical and experimental physics; the 
Davy Medal (in duplicate) to D. Mendelejeff and Lothar Meyer 
for their discovery of the periodic relations of the atomic weights. 
These medals will be presented at the anniversary meeting of 
the society on St. Andrew’s Day. 
THE President and Council of the Geological Society hold a 
| conversazione in the Society’s rooms on Wednesday, the 29th 
inst. Fellows of the Society who have objects of interest suitable 
for exhibition are asked kindly to lend them for the occasion, 
Ir is announced that General Pitt Rivers will be appointed 
Inspector of Ancient Monuments under the recent Act. 
WE announced last week the death, at the age of sixty- 
six years, of Prof. Johannes Theodor Reinhardt, Inspector 
of the Zoological Museum of the University of Copen- 
hagen. Prof, Reinhardt was a well-known zoologist, author 
of an excellent memoir on the Birds of the Campos of 
Brazil, and of numerous papers in the scientific periodicals of 
Copenhagen, and will be regretted by many friends and corre- 
spondents in this country. 
Ar the sitting of the Paris Academy of Sciences on November 
13, M. Faye read letters from the captain of the Miger, French 
