BAIKD ^rarLOCK (LONDON) LTD. 



SECTION No. 22. 



Lecture Diagrams and Hygiene Models. 



IRON & STEEL 



DETERMINATION OF MOLECULAR WEIGHT. 



MSTKt* -* KWULtl Hll 



5980-5982 5980-5982 



5980 T Low's Chemical Lecture Charts. A series of twenty-five sheets, 40 by 30 in. Price 



plain 



5981 T Low's Chemical Lecture Charts. Price backed with linen . . . . . . 



5982 1 Low's Chemical Lecture Charts. Price backed with linen, varnished, and mounted on 

 rollers .. .. .'. .. .. .. .. .. 



The object of the charts is to simplify the work of the teacher by supplying him with first-rate drawings 

 in bold outline, of arrangements of apparatus for elucidating the more difficult experimental details of chemical 

 manipulation. Apparatus, inaccessible to ninety-nine per cent, of the schools of the country on the ground of 

 cost, is always available in the lecture halls of the leading colleges and universities. A cheap equivalent to the 

 less pretentious classes has long been desired, and we therefore appeal to all teachers of chemistry who are preparing 

 pupUs for the examinations of the Science and Art Department, the London Matriculation or Intermediate Science, 

 Oxford and Cambridge Local, Preliminary Scientific, etc., etc., to carefully consider the merits of these aids to the 

 teaching of chemistry. They have been compiled from the most reliable sources, and embody much pictorial 

 information which is not easy of access to most teachers, many of the illustrations not yet having appeared in 

 ordinary text-books. They would be of great service in all organised science schools, and an acquisition to every 

 chemical laboratory, serving not merely as aids in the lecture, but also as a means of mutual help among students. 





Fig. I. 



2. 



,. 3- 



Fig. i. 



2. 



LIST OF SUBJECTS 

 No. 1. 



Catalan Forge for Iron-smelting. 

 A modern Blast Furnace. 

 The Bessemer Process. 







1 11 

 2 10 



3 10 



v 







Fig. i. 

 2. 

 ., 3- 



No. 2. 



Manufacture of Nitric Acid. 

 Boric Acid. 



No. 3. 

 Gravimetric Composition of Air (Dumas & Boussin- 



gault). 



Atomic Weight of Carbon. 

 Gravimetric Synthesis of Water. 



No. 4. 

 Lothar Meyer's Curve. 



No. 5. 



Isolation of Fluorine (Moissan's Apparatus). 



U tube, sectional view. 



Preparation of Anhydrous Hydrofluoric Acid 



FIGURED ON LOW'S CHARTS. 



No. 6. 



Determination of Molecular Weight. 

 Fig. i. Victor Meyer's Apparatus. 

 2. Dumas Method. 

 ,, 3. Hoffmann's Apparatus. 

 4. Raoult's Method, as modified by Beckmann. 



No. 7. 



Solubility Curves. 

 Carbonic Acid Isothennals. 



No. 8. 





Reverberatory Furnace. 



Pattinson's Process for desilverising Lead. 



No. 9. 



Fig. i. Distillation of Water. 

 2. Charcoal Burning. 

 3. Distillation of Coal. 



No. 10. 



Extraction and Sublimation of Sulphur Lime Burning. 



CROSS STREET HATTOTST GARDETST, 



1088 



