176 Sir Everard Home on the changes the blood 
combinations produced that are met with in the structure of 
muscles, must require farther investigation. It is deserving 
of remark, that while the globules are enveloped in their 
colouring matter, they are not seen to run together, and 
coalesce with one another on the field of the microscope ; it 
is therefore probable that the attraction, by which this effect 
is produced, only takes place between globules deprived of 
their colour. 
It may not be amiss to enquire how far there is any thing 
in the formation of fibres in other parts of the body at all in 
favour of muscular fibres being composed of globules, and I 
shall mention that Mr. Bauer, in his examination of the 
substance of the brain, under the microscope, finds, that when 
that organ is immediately after death made the subject of 
examination, abundance of fibres are met with in every part 
of it; indeed it appears that the whole mass is a tissue of 
fibres, which seems to consist entirely of an accumulation of 
globules, whose union is of so exceedingly delicate a nature, 
that the slightest touch, even the mere suction in water, 
deranges and reduces them to that mass of globules of which 
the brain appears to be composed when examined with less 
accuracy, or under less favourable circumstances. He admits 
that in his first observations he was induced to believe that no 
such things as fibres were to be met with in the brain , but 
that the whole organ consisted of a mass of these globules. 
He found that the globules of the brain, as well as those of pus, 
are exactly the same size as those of the blood when deprived 
of their colouring matter. 
Mr. Bauer not having completed the investigation of the 
brain, in which he is engaged, I shall not farther anticipate 
