HYGIENE OF I^IVESTOCK II27 



The three species have crossed ; they have even hybridised with remoter 

 species, such as E. hotryoides. 



The writer discusses the uses of the Eucalyptus and combats the pre- 

 judices existing against this tree. Formerly, for instance, its wood was 

 regarded as a bad fuel. The high price of coal however has resulted in 

 trials of wood stoking of furnaces, and it has been found that 563 lbs. of 

 dry branches of Eucalyptus can replace 220 lbs. of coal briquettes (i). Eu- 

 calyptus can also be used for telegraph poles or railway sleepers. Old build- 

 ing frameworks made of Eucalyptus, are already in existence. It is also be- 

 ginning to be esteemed in cart and carriage building. Finally, some very 

 fine " Red gum " furniture places the value of this wood for cabinet making 

 beyond doubt. 



The writer points out the following species, indicating the use for 

 which each is best adapted ; E. globulosus, very rapid growth in deep soil, 

 utilised in the harbour works of Algiers ; E. Red gum, the two hybrid forms 

 E. algeriensis and E. Trabuti are to be preferred to the original species E. 

 rostrata, E. nidis and E. tereticornis ; E. cladocalyx or corynocalyx, highly 

 resistant to drought, upright trunk, very regular, hard wood, is suitable for 

 telegraph poles and railway sleepers; E. diver sicolor or colossea, the Austra- 

 han " Karri ", very widespread, same uses as the last named ; E. gompho- 

 cephala^ theTouart, audits hybrid E. gomphocornuta Trab., a very fine tree, 

 good wood, rare ; E. occidentalis, var. oranensis, a fine tree in the salt soils 

 of Oran, abounding in the domain of Habra ; E. robusta, with the last nam- 

 ed in the salt soil of the domain of Habra ; E. obliqica or gigantea, fine 

 specimens of the forestry Station of Bainem, Hght wood, easily worked, at- 

 tains great growth in deep soils ; E. maculata very upright trunk, high, re- 

 sistant wood, difficult to raise in its young stage ; E. viminalis, very fine spe- 

 cimens at Djebel-Ouach, Constantine (altitude 3300 feet) ; the seeds should 

 be gathered here in order to grow the tree at Stations of similar elevation 

 in Djebel-Ouach ; E. botryoides, a species presenting numerous varieties, 

 probably hybrids, of fine growth ; a selection of these should be made. In 

 E. botryoides the leaves have the normal horizontal position ; this species 

 is much more shad}^ than its fellows ; it is a fine avenue tree, with a very 

 beautiful wood which looks like mahogany. 



LIVE STOCK AND BREEDING. 

 CS77- Experiments in Control of Livestock Epidemics by means of Methylene Blue. — 



Raebiger and Rautmann, in Btrlincr Turdrzlliclic H'ochcnsclin'/I, 3-Mid Yaw, Nn. ^2, 

 pp. 253-258. Berlin, ist June, 1916. 



Since December 1913, the writers have been conducting experiments 

 with a view to combating various e]jidemic diseases of livestock by means 

 of methylene blue {Methylcnum caeruleum medicinale Hochst), introduced 

 into the stomach of the animals. It is well known that methylene blue tends to 



(i) See B. July 1916, No. 789. • {Ed.) 



