GEOGRAPHY OF DEVONSHIRE AND CONSUMPTION. 99 
are part; the so-far ultimate cells are " early checked in their de- 
velopment, and early succumb to a process of shri veiling' ' (Yirchow) ; 
the cells, plasma, blood, nerve segments, lack, in certain segments 
of the body, vital force. That such early failure of formative force 
shall occur in the lungs can be, in a large number of individuals, 
many years before that it happens, predicated, where certain other 
anatomical conditions and types of body exist, as to skin, nails, 
hair, upper incisor teeth, &c. ; these profound relationships of 
Phthisis, in the Natural History of the body, are seen in Here- 
ditariness. The law or " Form " of Hereditariness prevails in 
living being ; but in the progress of this law minor latent contained 
deviations temporarily appear. Qualities which are hereditary, 
arise, evolve, in living beings, by and of certain physical relations, 
time being allowed : On earlier (foetal) cell forms, which " over- 
lap " in man; on latent qualities and tendencies in animals — 
dormant generally — but which may become apparent at certain 
ages, and under certain physical conditions — " contained varia- 
bility." Again, hereditary qualities disappear by and of certain 
physical relations. Phthisis can be both produced and prevented. 
(Central Asia, negroes in Guiana, &c.) 
Slow rates of the Evolution or Series of changing animal types, 
and structure. — Geological time must be allowed in the study of 
hereditary variability, variations of type of animals, and of the 
deviation of animal tissue and structure. 
"Form" (F. Bacon) of Phthisis. — Phthisis is a natural deviation 
of growth. " Every diseased structure has a physiological proto- 
type" (Yirchow); probable, that results which are u common" 
(natural or normal) in some animals, are of the same series as 
so-called "specific" in man (Simon). Phthisis is a rapid fever in 
some regions; a varying slow deviation of growth, generally, in 
Britain; but such variations of type "overlap" in instances. 
Phthisis has relation of interchange with ague ; follows, in a series, 
after fevers (measles, &c.) ; is inoculable ; is producible by certain 
modes of life and external physical relation ; is hereditary ; is 
preventable by certain full natural physical relations and co- 
ordinations; more related to female, than to male lines of Being. 
We thus approach the "Form" of Phthisis, by so varied external 
relationships ; and again by the deeper lines of the series of vital 
evolution, structure and being ; by alliances existing between the 
"common" and so-called "specific" capacities and changes of 
G 2 
