Fig. 38. —VIEW OF A THIN DISC OF HUMAN BLOOD, PRESSED BETWEF.N TWO PLATES OF 
GLASS, THE REAL DIAMETER OF THE PART SHOWN BEING THE 12QTH OF AN INCH, 
DAGUERREOTYPED BY MESSRS. DONN& AND FOUCAULT. 
MICROSCOPIC DRAWING & ENGRAVING. 
CHAPTER III. 
48. The beetle.— 49. Its larva.— 50. Drawing of it in its natural size.— 
51. Dr. Goring’s magnified drawing.— 52. Production of the beetle 
from the egg.— 53. The young larva.— 54. Its voracity and manner 
of seizing its prey.— 55. Description of its organs.— 56. Its chrysalis. 
—57. Water-beetle.— 58. Gnat.— 59. Dr. Goring’s method of 
drawing.— 60. Drawing by the camera-lucida.— 61. Section of the 
human skin ; sweating-gland and duct.— 62. The itch insect.— 63. 
Method of obtaining it. 
48. Another of the tribe of insects, of whose larva Dr. Goring 
has left a beautiful drawing, is the beetle, shown in fig., 32. 
49. The larva of this insect, like the former, is an inhabitant of 
the water. It is remarkable for its ferocious and savage disposition, 
Lakdner’s Museum of Science. g 81 
No. 71. 
