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MICROSCOPICAL INVESTIGATION.
built up of little spheres. R. HOOKE considered the bodies
observed to be prisms.
The study of angeiology was facilitated in an extraordinary
degree by the newly-discovered process of injection*
in the improvement of which SWAMMERDAM and
•RUYSCH rendered the greatest services. For injections
they used coloured, easily coagulating, resinous liquids.
RUYSCH, of whom it is said that he possessed the hands of
.a fairy and the eyes of a lynx, was able thus to determine
the presence and distribution of blood vessels in parts of the
body which had previously been considered non-vascular.
He described also the bronchial vessels and the coronary
vessels of the heart; KERCKRING discovered on the portal
vein of the horse the vasa vasorum, and LEEUWENHOEK
threw light upon the structure of the vascular coats. The
anatomy of the heart was illustrated by STENO, LOWER,
and VlEUSSENS. To their work the labours of WlNSLOW
and.SENAC were added at a later period.
The lungs were carefully examined by MALPIGHI ; he
stated that they are composed of little sacks the partitions
between which are richly provided with vessels.f GLISSON
gave an exemplary description of the anatomy of the liver, J
while MALPIGHI devoted his attention to the spleen and
was also the first to recognize that glands are built up of
acini.§ JAMES DOUGLAS, whose name has been preserved
in the history of anatomy through other observations which
he made, described the relative position of organs in the
abdominal cavity. The Swiss doctors PEYER and BRUNNER
discovered the glands of the intestinal canal, G. WlRSUNG
the ductus pancreaticus, STENO the duct of the parotid
gland, WHARTON that of the submaxillary gland and
•QUIRINUS RIVINUS those of the sublingual gland. MAL-
* BURGGR-EVE op. cit. p. 294 et seq.
t De pulmonibus epist. duae in MALPIGH'I : Op. omnia, London 1686, iii, 133
•et seq.
, »-»
+ F. GLISSON: Anatomia hepatis, Amstelod. 1659.
§ M. MALPIGHI : De structura glandularum conglob., London 1697.