[ 22 ] 
fometlmcs 'hexagonal ; each of which is com po fed of 
many Filaments, or tendinous Fibres, which are pa- 
rallel to one another in every little Bundle or Fafci- 
culc, and adhere together by a tenacious Gluten , if 
they are not continued to tile Extremities of Tendons, 
or Membranes 5 and fometimes are immediately con- 
ne&ed to Bones, or carnous Fibres. 
XXVIII. 
That befides, thefe Bundles are every-where in : 
veiled and bound together by innumerable tranfverle 
Fibres *, as it appears in a Mufcle boil'd, and imme- 
diately dry’d; which nervous Fibres feem to compofe 
certain reticular Membranes, together with the Capil- 
lary Veflels § that, bring Blood to them, and carry 
it back asain ; and that rhefe Fibres are nervous, he 
conje&ures from their being very hard and tough. 
XXIX. 
His Dcfcription of a rnufcular Fibre, which he has 
obferved after being boil’d, is, that it Teems,- by the 
Help of a Microfcope, to be a Cylinder like the Twig 
of a Tree, not hollow, as a Reed is, but is obferved 
to be full of a medullary Subfiance, which ought to 
be fpungy like the Pith of Elder ; becaufe every fofr 
Twig, which is fill’d with any adventitious Moiflure, 
grows turgid, and is neceffarily porous, fince it is 
fill’d 
* Thefe are no other than the Fibres of the inventing Membrane 
mention’d under Mayo<i u in Note ( # ) Seff. 24. 
§ This reticular Strudure is made ufe of by Dr. Stuart in his Ex- 
planation of rnufcular Motion j which fee in his Turn. 
