264 PROCEEDINGS OF THE -SOCIETY. 



tube of the wheat on the stigma — he did not think this had been' 

 demonstrated before on the screen, so as to show the double staining. 



Mr. Flatters thought the reason for the difference in staining was 

 because the phloem was vascular tissue, which took up the malachite 

 green very readily, whilst the cambium was cellulose. It stained much' 

 deeper in some plants than in others, and also in the same plant in 

 different stages of growth. Specimens collected during the next few 

 weeks, when the new tissue was forming, would be found to take up the- 

 stain more rapidly than those collected in December, so that to stain 

 properly it was necessary to know the age of a section and the time of 

 year it was taken. Then they could not stain these just what they liked, 

 each would select its own stain and take up what it required, and then 

 the colour had to be reduced in strength until the required tint was 

 obtained. Tissue took up stain much more readily than celloidin. 



The thanks of the Society were, on the motion of the President, 

 cordially voted to Mr. Flatters for his exceedingly interesting and' 

 beautiful exhibition. 



The following Objects, Instruments, etc., were exhibited : — 



Mr. Abraham Flatters — 



1. Entire plant of Duckweed, Lemna minor. Showing root-caps and 

 developing roots from the secondary platelets. 



2. Transverse section of root, Pinus sylvestris. Cut ^vim Stain,. 

 hasmatoxylin and safranin. 



3. Transverse section of root of Buttercup, Ranunculus acris. Cut 

 r l 6 Stain, hematoxylin and gossypimine (cotton red). The starch 

 grains having taken up the gossimine. 



4. Transverse section of root of Yellow Iris, Iris pseudo-acdrus* 

 Cut tItj Stain, hamiatoxylin and safranin. Secondary rootlet is 

 being developed from three xylem bundles. 



5. Transverse section of root of Zea mays (Indian Corn). Cut - (i l T} 

 Stain, carmine and malachite green. Throwing off several secondary 

 rootlets. 



G. Transverse section through radical end of a grain of Barley.. 

 Showing the development of primary and four secondary rootlets, 

 surrounded by nucleated tissue of the endosperm. 



7. The primary of tap-root from the last preparation. Enlarged tc* 

 show the disposition of cells to form vascular system of root. 



8. Longitudinal section through apex of aerial root of Monstera 

 deliciosa. Cut 7 oVo by the cold paraffin method. Stained with brazilin, 

 to show nucleated tissue and elongated or needle raphide cells. 



9. Enlargement of No. 8 to show the raphides (in situ). 



10. Transverse section of hypocotyl of Bean, Faba vulgaris. Cut 

 7^, immediately below cotyledons. Stain, carmine and malachite 

 green. 



11. Transverse section of stem of Clover, Trifolium repens. Cut 



7TOT5" 



Stain, carmine and malachite green. 



12. Transverse section of stem of Bog Bean, Menyanthes trifoliate.. 

 Aquatic type. Cut ? £tj Stain, carmine and malachite green. 



