SCIENCE AND INDUSTRY. 
/It very early became a pest in the Bremer River, near Ipswich, Queensland, 
and during floods and freshes large areas of many acres were discharged ;into the 
Brisbane River, threatening danger to navigation and damage to the bridges by 
collecting flood débris above these structures. In Queensland it obtained a hold 
in the western rivers, and also became a pest in the lagoons in the Rockhampton 
district. It was intréduced into the Wagga district, New Southi Wales, as 
RICHMOND RIVER (N.S.W.) SHOWING HYACINTH. 
carly as 1895, and rapidly spread, covering about 74 acres, or half of the Wol- 
londry Lagoon. The growth was remoyed in 1900 by men in a boat at a cost 
of about £8. There is great danger of its spread to the sluggish fresh water 
rivers like those of western New South Wales—Murray-Darling system—the 
channels and divides of places like the Yanco irrigation canal. It has taken 
possession of drains and larger channels cut in swamp reclamation projects, ¢.9., 
at Alumny Creek. 
= 
CORAKI BRIDGE CLEAR OF HYACINTH. 
228 
