XVI 



CONTENTS. 



OF COLLECTING, KEEPING ALIVE, AND EXAMINING THE LOWER ANIMALS. 



Of collecting and dredging. 



Vivaria and aquaria. 



Examination of lower animals during life. 



Examination of infusoria. 



Examination of vorticelloe and rotifers. 



Of keeping bodies moist while under 

 microscopical observation. 



Of keeping bodies moist at a uniform 

 temperature higher than the air while 

 under microscopical observation. 



Of the Tissues and Organs of the Lower Animals. 



Of preparing the tissues of insects for 



microscopical examination. 

 The scales and hairs of insects and 



Crustacea. 

 Trachece. 



Branchiae of mollusca. 

 Microscopic shells. 

 Contractility of muscle. 

 Ciliary movement. 



OF DEMONSTRATING THE TISSUES OF PLANTS. 



Examination of vegetable tissues. 

 Of the circulation in the cells of certain 

 plants. 



Of preserving vegetable tissues perma- 

 nently. 

 Of collecting and mounting diatoms. 



OF THE MOVEMENTS OF LIVING BEINGS, AND OF PURELY VITAL MOVEMENTS 

 PRIMARY OR VITAL MOVEMENTS SECONDARY MOVEMENTS. 



Of the primary or vital movements oc- 

 curring in living beings. 



Of the secondary movements occurring 

 in living beings. 



Of Molecular Movements Movements of Grannies within Cells. 

 Of growth and multiplication. 



OF THE EXAMINATION OF ROCKS, CRYSTALS, AND FOSSILS. 



Of the anatomy of crystals. 



Of the use of polarised light. 



Crystals of one mineral enclosed in 



another. 



On making sections of rocks and crystals. 

 Of the microscopical structure of iron 



and steel. 



Of measuring the angles of crystals. 



Of preparing fossils for microscopical 

 examination. 



Of preparing specimens of coal for micro- 

 scopical examination. 



THE WORK TABLE OF MAKING AND RECORDING OBSERVATIONS FALLACIES 



TO BE GUARDED AGAINST. 



The work table. 



Of keeping preparations in the cabinet. 

 Of making observations upon specimens 

 in the microscope. 



Of the importance of making sketches. 

 Of drawing inferences from observation. 

 Of recording the result of microscopical 

 observations. 



Fallacies to be guarded against in Microscopical Investigation. 



Errors of observation. 



On the difficulty of seeing structures from 

 their transparency. 



Fibres and membranes produced by the 

 action of reagents artificially. 



Fibrous appearances produced in struc- 

 tureless membranes. 



Collections of oil globules appearing as 

 if within a cell. 



On the accidental presence of extra- 

 neous matters. 



