Physiological Anatomy of the Lungs

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                                of lead in liquid size for the pump which is con=
=nected with the pulmonary artery, and the ordinary 
injection of size and vermilion for that allotted to 
the pulmonary veins, and in this case an addi=
=tional weight should be attached to the lever, be=
-longing to the pump, which propels the liquid 
into the artery; if, on the contrary, it be required 
to demonstrate the tufts of capillaries from which 
the Pulmonary veins take their origin, then it will 
be necessary to use the yellow injection for these 
and the red for the arteries, and to apply the pre=
=ponderating force of pressure on the pump which 
propels the yellow. The reason of this is that the 
yellow injection readily penetrates capillaries, 
which the red injection can only with difficulty 
be made to enter and after the injection has been 
made the yellow vessels shew themselves more vividly 
in contrast with the red. From this it will be 
seen, that it depends upon the circumstance as 
to which of the two has been subjected to the prepon=
=derating pressure to determine whether the injected 
capillaries rather partake of the colour of that which 
is propelled into the arteries or of that sent into the 
veins - Having made these preliminary arrange=

                            
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Manuscript details

Author
James Newton Heale
Reference
AP/43/4
Series
AP
Date
1860
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Physiological Anatomy of the Lungs, 1860. From The Royal Society, AP/43/4

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