1899-1900.] Dr J. S. M‘Kendrick on Enzymes in Tissues. 79 
( a ) What is their Action in the Conversion op Starch 
into Sugars 
I have drawn out the following table to show a comparison of 
results obtained in the conversion of starch into sugar by the 
extracts of normal tissues. I have used the terms “ abundant,” 
“considerable,” “distinct,” etc., to denote relatively the density of 
the precipitate formed by their action in the reduction of Fehling, 
so as to give a clue to the amount of sugar formed, thus indicating, 
roughly, the activity of enzyme in the tissue extract or presumably 
its amount. 
I. 
Rabbit’s 
Tissues. 
II. 
Child’s 
Tissues. 
III. 
Human Adult 
Tissues. 
IV. 
P.M. 
Tissues. 
Abundant 
Small Intes- 
Small Intes- 
Conversion 
tine X 
Large Intes- 
tine X 
Large Intes- 
tine X 
Stomach 
tine 
Liver X 
Liver X 
Liver (No. 2) 
Muscle 
Muscle 
X 
Muscle X 
Pancreas 
Pancreas 
Placenta 
Lung 
Spleen 
Spleen 
Considerable 
Lungs 
Liver (No. 1) 
Conversion 
Suprarenal 
Suprarenal 
X 
bodies 
bodies 
Kidneys 
Kidneys 
Small Intestine 
Distinct 
Heart Muscle 
Conversion 
Large Intestine 
Brain 
Fat X 
Thymus Gland 
Slight 
Muscle 
Bone X 
Conversion 
Kidneys 
Stomach 
SkinX 
Vermiform 
Heart Muscle 
Appendix 
Spleen 
Connective 
Cartilage 
Tissue 
Tendon X 
Fat X 
Fat X 
No 
Bones 
Bones 
Cartilage 
Conversion 
Blood 
Thyroid 
Ligament 
Lungs 
Brain 
Spinal Cord 
Nerve 
Hair and Skin 
Skin 
Skin 
Eyes 
Gall Bladder 
