224 REPORTS ON THE STATE OF SCItENCE.—1915. 
Where 7 = No. of arcs into which tube divides in collapsing. 
= Young’s Modulus. 
By comparison with Fairbairn’s experiments, proposed the formula 
e 
p = 115,000,000 je gms 
provided that / is less than 6-7 d? 
0%" 
qo:'8 
23 Westphal, M. 1909 Tubes under External Fluid Pressure. ‘ Zeitschr. 
Vereines D. Ing.,’ 53, pp. 1188-1191, 1909. ‘Sci. 
Abs.,’ 1909, No. 664. 
24 Wilson, R.,and 1876 ‘ Engineering,’ vol. 21, 1876, pp. 392, 410, 441, 458, 
others. 483, 512; vol. 22, pp. 9, 30, 36, 75. 
A discussion of Fairbairn’s formula. 
25 Board of Trade Rules for Survey of Passenger Steamships,1913. § 149, ‘ Circular 
Furnaces.’ 
and greater than 4,469 
26 Lloyd’s Rules for Survey and Construction of Engines and Boilers of Steam 
Vessels. Section 16; ‘ Circular Furnaces.’ 
The Lake Villages in the Neighbourhood of Glastonbury.—Report 
of the Committee, consisting of Dr. R. Munro (Chairman), 
Professor W. Boyp Dawkins (Secretary), Professor W. 
Ripceway, Sir ArTHUR J. Evans, Sir C. Hercuues Reap, 
Mr. H. Baurour, and Mr. A. BULLEID, appointed to investi- 
gate the Lake Villages in the Neighbourhood of Glastonbury 
im connection with a Committee of the Somersetshire Archeo- 
logical and Natural History Society. (Drawn up by Mr. . 
ARTHUR BULLEID and Mr. H. St. Georce Gray, the Directors 
of the Excavations.) 
Tue fourth season’s exploration of the Meare Lake Village by the 
Somersetshire Archzological and Natural History Society began on 
May 15, 1913, and was continued until June 7. The ground excavated 
was situated in the same field and was continuous with the work of 
1910 and 1912. The digging included the examination of Mounds III. 
and IV., the S. quarter of Mound V., the N.E. part of Mound XIII. 
(remaining from last year’s exploration), and portions of Mounds XV., 
XVII., and XVIII. 
Structurally the excavations proved to be of considerable interest 
and the number and importance of the relics discovered this season 
were greater than those of the previous year. 
With reference to the construction of the mounds the attention of 
the directors was centred in the examination of Mound XIII., which 
revealed many features of exceptional interest. This mound consisted 
of four clay floors having a total thickness of 6 ft. 8 in. The lower- 
most floor was subdivided into a number of thin layers of clay of 
various colours, each having a baked clay or stoned hearth in the. 
