2 Minute Anatomy of the [^rj^^^%^^^!:^S!' 
with the tenets held respecting the primary and suhsidiary func- 
tions, that we can only hope through renewed observations to 
harmonize the discrepancies and arrive at satisfactory conclusions. 
Though all addition to positive knowledge preludes further research 
with an authority of a substantial nature, still it is desirable to 
strive to establish conformity in observation by adopting some par- 
ticular method, and thus procure a general credibility as one step to 
uniformity of results. In animal tissues prepared for microscopic 
investigation without this precaution, we cannot expect to arrive 
at similarity of opinion. Thus we should seek to employ the best- 
known methods for preparing specimens. Judging from the highly 
valuable contributions to the Eoyal Society by Dr. Beale, marked 
with originality in investigating minute structures by the highest 
magnifying powers, and illustrated with extreme care, I have not 
hesitated to adopt the method advocated by him, but which on the 
Continent appears set aside for less suitable plans. 
In that much-examined creature the Common Frog {Bana 
temporaria), there is in the observations on the structure of the 
Papillse alone, no close or common agreement amongst the nume- 
rous observers. It therefore appeared desirable to recommence 
the study of some parts by the same method as that adopted by 
Dr. Beale in his examination of the papillae of the Hyla, especially 
as the animal can be readily procured, easily injected, and affords 
much chance of obtaining an insight into those general conditions, 
under which we may suppose ahke functions are manifested in 
higher classes. 
The drawings and photographs are not exactly similar to those 
set forth by previous observers ; but there are several points which 
accord more with some microscopists, less with others, and the dif- 
ferences can be brought within a certain relation. Drawings are 
also given of the arrangement of nerves as applied to the surface of 
voluntary muscles in the tongue, and of the lax tissue beneath 
this organ. 
It is purposed, firstly, to note the appearances presented in 
these different parts, and then endeavour to draw some general 
conclusion. 
It may be necessary to premise the animal was first injected by 
glycerine prussian-blue solution, and that such magnifying powers 
only have been used for the drawings as would enable me to trace 
much larger surfaces than those generally given (by which the 
action of the various parts may be more easily estimated), and 
the camera lucida used for each. Hence in many places where 
only single fine nerve-fibres are figured, by much higher magnifi- 
cation they can often be shown duplicated, or to consist of even 
more than two fibres in conjunction at some near part of their 
course. The photomicrographs are added to help the illustration, 
