i> = 4) i a y 
_ Jawuary 13. 19P3] 
NATURE 59 

_ Frenchman, Lt. Thoret. The event took place at 
_ Biskra in Algeria on Wednesday, January 3, and 
Lt. Thoret stayed in the air more than seven hours, 
from 9.3 A.M. till 4.4 P.M. It is interesting to note 
that the flight was carried out on an ordinary aeroplane 
in which the power had been shut off completely, and 
_ not in a specially designed glider. The loading was 
3°8 lb. per square foot instead of 2-2 lb. per square foot 
~ as in the specially constructed gliders used during the 
summer. The machine was a Hanriot 14 biplane, 
_ weighing 1364 lb. including a motor of 80 H.P. 
APPLICATIONS are invited for the Theresa Seessel 
Research Fellowship of Yale University, value 300/., 
for the promotion of original research in biological 
studies. Preference will be given to candidates who 
have already obtained their doctorate, and demon- 
strated by their work their fitness to carry on success- 
fully original research work ofa high order. The holder 
must reside in New Haven during the college year, 
October to June. Applications, which should be 
accompanied by reprints of scientific publications 
and letters of recommendation, and a statement of 
the particular problem which the candidate expects 
to investigate, should be made to the Dean of the 
Graduate School, New Haven, Conn., before May 1 
next. 
A SPECIAL meeting of the Royal Society of Medicine~ 
will be held on Friday, January 26, at 8.30, to 
commemorate the centenary of the death of Edward 
Jenner. There will be an address by Sir W. Hale- 
White on “ Jenner and his Work,” and objects of 
historical interest will be shown. 
Tue Trueman Wood lecture of the Royal Society 
of Arts will be delivered by Sir William Bragg 
at the Society’s house, Adelphi, at 8 o’clock on 
Wednesday, January 24. The subject will be ‘The 
New Methods of Crystal Analysis, and their Bearing 
on Pure and Applied Science.” 
A NEw section of the Royal Microscopical Society 
has been formed for the purpose of dealing with the 
practical use of the microscope in connexion with 
industrial research. The inaugural meeting of the 
section will be held at 20 Hanover Square, W.1, on 
Wednesday, January 24, at 7 o’clock. 
ite, 
Tue following free public Gresham lectures will be 
delivered at Gresham College, Basinghall Street, at 
6 o'clock, on the dates named :—Physic, by Sir Robert 
Armstrong-Jones (January 23, 24, 25, and 26); 
Astronomy, by Mr. A. R. Hinks (January 30, 31, and 
February 1 and 2) ; Geometry, by Mr. W. H. Wagstaff 
(February 6, 7, 8, and 9). 
Tue Silvanus Thompson Memorial Lecture will be 
delivered at the Technical College, Leonard Street, 
E.C.2, on Thursday, February 1, at 7.30 p.M., by 
Sir Oliver Lodge, who will take as his subject ‘‘ The 
Basis of Wireless Communication.”’ The chair will be 
taken by Sir Charles Parsons. After the lecture a 
conversazione and re-union of old students will be 
held. A collection of Prof. Thompson's paintings 
and apparatus will be shown and a number of demon- 
strations will be given in the laboratories. 
A COMMITTEE, consisting of representatives of the 
Institutions of Mechanical Engineers and Naval 
Architects, has been appointed with the object of 
carrying out tests on oil engines and of reporting 
on the performance of motor-driven vessels. The 
Engineer-in-Chief of the Fleet has, with the approval 
of the Admiralty, joined this committee. In scope, 
the proposed trials will include economy and thermo- 
dynamic tests ashore and manceuvring tests at sea. 
Wherever possible the behaviour of the propellers and 
the hull will be examined. It is intended to test 
engines of as many representative types as possible. 
The first actual testing work will probably be carried 
out about April next. 
Tue National Institute of Agricultural Botany is 
now accepting entries for its second series of yield and 
quality-trials of new varieties of potatoes from breeders 
who are willing to entrust the Institute with the 
marketing of their productions on a profit-sharing 
basis. The trials are planned to last for five years, 
at first in Scotland only, but in.the later years also 
in the English potato districts. Only those varieties 
which do sufficiently well in the trials will be placed 
on the market. Full particulars of the conditions of 
the trials can be obtained from the Secretary, N.I.A.B., 
Huntingdon Road, Cambridge, to whom those in- 
tending to enter new varieties for these trials should 
apply not later than February 28. 
WE have received a copy of the programme, rules, 
and regulations of the International Exhibition for 
Photography, Optics, and Cinematography, which is 
to be held at Turin during next May and June in the 
Newspaper Palace at the Valentino Park, under the 
initiative of the Board of Trade and Industry at 
Turin, and under the high patronage of H.M. the King 
of Italy. The photography section is divided into 
seven classes, and each class into several sub-classes. 
Photography in general, optical projection, photo- 
mechanical methods, photography in its application 
to science, photographic materials and literature, are 
all included. The optical section includes optical 
glass, machinery for making lenses, prisms, etc., 
spectacles of all sorts and oculists’ apparatus, micro- 
scopes, telescopes, opera glasses, optical instruments in 
general, bibliography, and schools. The cinemato- 
graphy section is similarly classified. Applications to 
exhibit must be made on forms that will be supplied 
and which must arrive, duly filled in, not later than 
March 1 at the General Commissary, Via Ospedale, 26, 
Turin (the head office of the executive committee.) 
Tue character of the primitive Crustacean limb was 
disputed between Mr. E, W. Shann and our reviewer 
in our issue of December 2 (p. 736). In fairness to 
the former, a statement of the present state of know- 
ledge seems called for. It is now generally held by 
the leading authorities that Trilobites represent the 
ancestral group from which Crustacea were derived. 
All investigated species of these appear to have had 
biramous limbs, while some of the most primitive 
had the posterior region of the body relatively soft 
and uncalcified, and were in process of evolution 
weer 45 es em 
a 
NO. 2776, VOL. 111] 
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