Rabbit fumigation

Not all poisons act by absorption from the alimentary tract or through the skin, the fumigants are a big group of poisons used in pest control which act on the animal after being absorbed through the lungs. FUMIGATION as it is now used in Western Australia is not always an economical way of treating whole farm properties. It should only be used on its own in areas where it is impossible to use other more permanent methods such as warren destruction

The vermin bonus system in Western Australia. Part 1

Rabbits, dingoes or wild dogs, foxes, emus, kangaroos (in certain areas) and wedge-tailed eagles are the most economically important vermin species in Western Australia. They are responsible for heavy losses to the agricultural and pastoral industries and - except in the case of rabbits and kangaroos- vermin bonus are paid for their destruction

Anticoagulants for the control of rats and mice

LATELY there have been many requests for information on suitable poisons to use in baiting rats and mice. Most enquirers have stated that they tried a certain brand of bait and found that the rats only ate it up and kept coming back for more. This article on Warfarin—as a rat and mouse poison—is presented to clear up some of the problems of rodent poisoning

Wallaby control in the Kimberleys

EXPERIMENTS aimed at controlling sandy wallabies along the Fitzroy River frontage were started in 1952 by officers of the Agriculture Protection Board. This work was undertaken in response to requests for assistance from some of the station owners and managers between Derby and Fitzroy Crossing

Emus in the Northern Wheatbelt - Notes on observations - January1958 to March, 1959

During the period from January, 1958, to March, 1959, advantage was taken of an opportunity to observe a population of emus (Dromaius novae-hollandiae) at close quarters and an effort was made to gain some knowledge of the breeding behaviour, feeding habits, the extent of range and the damage caused by the birds The observations were collected while experimenting with methods to control the emu, during which, their reactions to colour, foreign food media and poisons were behur studied

Faraday and the powers of matter : the role of principles, hypotheses, and the interpretation of experiment in the development of Faraday's field theory, as presented in his Experimental researches in electricity, 1830-1855: Matter, force, and the field in the work of Faraday, Thomson, and Maxwell : 1830-80

Faraday's Experimental Researches in Electricity are the account of an active dialogue with nature; an attempt to achieve what Faraday himself described as an ever closer agreement between ‘natural truth and the conventional representation of it'. The object of the present study is to examine the basic concepts of the language in which this dialogue was carried out and to determine those assumptions made by Faraday indeveloping it inte a general and fundamental theory of the properties of matter: the field theory. I have sought answers to three main questions: (1) How does Faraday progress from the observation of phenomena and the analysis of experimental data to the development of specific theories of electrical, chemical, and magnetic actionand, finally, to a general theory on which an apparently unobservable entity, the field, is posited as the causal basis of the properties of matter and of the laws of those properties? (2) How does Faraday use the concept of an atom or ultimate particular, and why does he abandon this concept in favour of that of the field as the basis of the properties of all individuals, thereby subverting the atomic theory, the mechanical-corpuscular view of nature, and the related notions of materiality, existence, and explanation? (3) How does Faraday justify the theoretical conclusions that he reaches at each of the main stages of his scientific career? In particular, how does he justify the claim that the field is a real entity in view of the fact that he has defined scientific knowledge as consisting only in direct perception and in empirically determined laws? In order to answer the first of these questions I make an analysis of Faraday's use of certain descriptive terms and explanatory concepts, of the way in which these are refined or redefined in the light of both expected and unexpected experimental results, and of the role played by certain higher-order principles or postulates. I show that these principles specify Faraday's theoretical concepts (such as power, action, atomicity, polarity) and his meta-theoretical concepts (causation, existence, identity, explanation), and that they govern his interpretation of experience and, therefore, his evaluation of rival theories. Only when these principles have been identified can the second and third questions be answered, for I show that Faraday's theoretical conclusions and his attitude toward the theoretical utility of atoms or individuals as ultimate entities turn upon these beliefs about what is possible. Continued in thesis ..

The fox : status and control

NOBODY knows for certain and it is possible that the damage done by foxes is sometimes over-rated, but the fact remains that foxes are reputed to be a real problem to some farmers at lambing time

Myxomatosis : its decline as a killer

ALTHOUGH nearly every farmer in Western Australia is familiar with myxomatosis, very few landowners really understand the factor causing the disease to spread or, just as importantly, why the severity of the disease is declining

Rabbit damage to pastures

Rabbits eat a lot of pasture that would be normally available for other more profitable types of livestock. Just how much they do eat we cannot say, although most farmers have their own ideas on the subject. Some farmers maintain that a rabbit will eat (or damage) as much pasture as a sheep; others say that 12 rabbits are needed to equal one sheep. Possibly the true figure lies somewhere between these limits, but if any reader has definite views or recorded observations on the comparisons, I would be glad to hear from him