( ^93 ) Numb. 199 
PHILOSOPHICAL 
TRANSACTIONS. 
For the Month of April, «693. 
The CONTENTS. 
L /^\Bfervations on the comparative, intenfive or Jpec'r 
\_J fic Gravities of various Bodies made by Mr. J O 
II. Ext rails of feme Letters from Mr. John Sturdie of 
Lancafliire concerning Iron Ore, and more particularly of 
the Haematites wrought into Iron at Milzhr op- Forge in 
that County, communicated by Martin Lifter, M. D. and 
S. R. S. III. The Ext rati of a Letter from Mr. Anth 
Van. Leeuwenhoek concerning the Seeds of Come Plants, 
with Obfervations on the manner of the Propagation of 
Plants and Animals. IV. Fart of a Letter from Sir R.B 8 
S. R. S. to Dr. Lifter, concerning the Giants Cawfway in 
the County of Antrim in Ireland. V. A Relation of a. 
Storm of Thunder <WLightmng, &c. at Oundle in Nor- 
thamptonshire on the 20th of March laH, by Mr. W. R. 
VI. Some Anatomical Obfervations in the Heads of fe- 
deral Fowl, made by the late Alien Moulin, M D. S R.S. 
VII. An Account of Books, 1. TI T P E T O A OF I A, , 
feu Exercitariones de Morbis Univerlalibus Acutis. Autb. 
Ric. Morton M.D.CfV. LondJn 8°.f 692 x/Caialogus Plan- 
tarum Horti Academici Argent inen^s \ &c. adcurants 
Marco Mappo M.D. &c. Argcntorah apud Fr id. Spoor, 
1691. in iz°. 3 Stephani Chauvini Thcfiiurus PhilcfQ- 
phicus, &c. in Fol. 1692. 
T I.OJ-. 
