JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATE XV, 



Figs. 6 — 14. 



Illustrating Dr. Thin's paper on the Structure of Muscular 



Fibre. 



(The figures were drawn as observed with Hartnack's Objectives No. 3 or 

 Ko. 7, with No. 3 Eyepiece (old system). According to the values assigned 

 to these nuoibers in the Prix-Courani, Paris, 1872, the No. 3 is equivalent 

 to a magnifying power of 50, and the No. 7 of 300 diameters). 



Fig. 6.— Primary bundle («) isolated. Obj. 7. 



EiG, 7.— Nuclei («) shown applied to the surface of a primary bundle!! 

 Obj. 7. 



Pig. 8,— Elongated narrow cells {o) partly detached from surface of a 

 primary bundle. Obj. 7. 



Fig. 9.— Cells seen entire on surface of secondary bundle. At « two 

 cells have the position of the nuclei similar to that observed in tendon- 

 ceUs. Obj. 7. 



Pig. 10. —An unbroken muscular fibre showing a natural divison at one 

 end into the larger component bundles. Obj. 3. 



Pig. 11.— Part of the fibre shown in fig. 10 more highly magnified. 

 Obj. 7. 



Pig. 12. — Divided end of a fibre in which the nuclei are well seen. 

 Obj. 7. 



Pig. 13. — The sarcolemma {b) preserved and within it a secondary bundle. 

 Obj. 3. 



Pig. 14.— The same as fig. 13, more highly magnified, {a) Sarcolemma 

 with nuclei, {b) the secondary bundle. Obj. 7. 



