422 Elimination of Algce in Lochs and Ponds, [Sess. 



plentifully. A common plant is also ZygopJiyllum coccineicm, 

 very succulent, with fruit capsules of a strong salty taste. One 

 wonders to find such a plant in the desert, and whence it gets 

 its moisture, and how it retains it under the strong sun. The 

 Bougainvillea, with a small inflorescence surrounded by beauti- 

 ful bracts and trained over trellises, is a notable feature about 

 Helouan. 



Next to the date-palm, perhaps the most important tree 

 now cultivated in Egypt is what the Arabs call " Lebbakh," 

 the AlUzzia Lehheh (Plate XXXVIII., Fig. 2), which thrives 

 well in this dry climate, grows quickly, and yields excellent 

 timber. In some of the avenues of Cairo it affords a delightful 

 shade from the burning sun. 



In conclusion, there is an indescribable charm about Egypt, 

 both in its present-day oriental life and in the history of 

 its past. 



Among the travellers of so many nationalities that one 

 meets, the opinion freely expressed is very favourable to the 

 British occupation, and certainly the fellahin should be grate- 

 ful to the country that has given them security for the result 

 of their labours and an honest administration. 



[At the meeting of February 28 Mrs Duncan gave, with 

 lantern illustrations, a bright and instructive paper entitled 

 "Bordeaux to Lourdes, and What I Saw There."] 



Y,—THE ELIMINATION OF ALG^ IN LOCHS 

 AND PONDS. 



By Mr JOHN LINDSAY. 



{Read March 27, 1912.) 



For a number of years the presence of certain Algae in the 

 reservoirs of the United States has been a source of much 

 trouble and considerable expense, and it is only within the 

 last decade that a satisfactory remedy has been found. 



