380 JOURNAL OF THE PLYMOUTH INSTITUTION. 
from guns. Cycloidal rotation in excentric discs. 1 Remarks on 
projection with helical rotation of a prolate body, or the rifle 
principle. Contravention of natural law by such arrangement and 
its penalty, by enforced limitation to any but the lower angles of 
elevation. Prospect of vertical fire being impressed by the 
cycloidal rotation 2 of excentric discs; an excentric disc is the 
application to projectiles of the principle of the Australian 
Boomerang. Remarks on the Boomerang. Remarks on planetary 
rotation. 
VITAL STATISTICS. 
SYLLABUS OF PAPER BY MR. AUGUSTUS H. BAMPTON, M.D. 
(Read February 7th, 1884.) 
The dismal science. Voices from the tombs. " Let 's talk of 
graves, of worms, and epitaphs ; make dust our paper ; and with 
rainy eyes write sorrow on the bosom of the earth." 
1. General and particular interest of the subject, as it treats of 
duration and expectancy of life. 2. Tabulates causes of death, 
and investigates high rates of mortality. 3. Unhealthiness of 
Plymouth in the past. 4. High infantile mortality — causes. 5. 
High general death-rate — causes. 6. Mortality in different climates 
and seasons. 7. Mortality in different occupations. 8. Military 
statistics — physique of the army. 9. School statistics concerning 
the growth of children. 10. Monetary loss by preventible deaths 
and sickness, economic aspect lost sight of too often. 
Summary and moral to be pointed. 
1 Fide (in library Plymouth Institution) Journal of Society of Arts, October 
24th, 1862, being paper by author, read in Section A of the British Association 
at Cambridge in 1862 — "Projectiles with Cycloidal Rotation Contrasted with 
those having Helical or Rifle Rotation." 
2 (In library Plymouth Institution). Transactions of the Devonshire 
Association for the Advancement of Science, Literature, and Art, vol. for 
1870. "Remarks (by author) on the Probable Inapplicability of the Rifle 
Principle for Vertical or Mortar Fire, and a Suggestion of Another Method." 
Also (in library Plymouth Institution), Proceedings of the (late) United 
Service Institute of Plymouth for 1874. Paper (by author) entitled "Some 
Remarks on the Rotation of Projectiles." 
