Meteorological Observations. 239 



The mode of combining the various sections of which the En- 

 gine is formed has been examined with unceasing anxiety, for 

 the purpose of reducing the whole combination to the greatest 

 possible simplicity. Drawings of almost all the plans thus dis- 

 cussed have been made, and the latest of the drawings (bearing 

 the number 28) shows how many have been superseded, and also, 

 from its extreme comparative simplicity, that little further ad- 

 vance can be expected in that direction. 



Mechanical Notations have been made both of the actions of 

 detached parts and of the general action of the whole, which 

 cover about four or five hundred large folio sheets of paper. 



The original rough sketches are contained in about five volumes. 



There are upwards of one hundred large drawings. 



No part of the construction of the Analytical Engine has yet 

 been commenced. A long series of experiments have, however, 

 been made upon the art of shaping metals ; and the tools to be 

 employed for that purpose have been discussed, and many draw- 

 ings of them prepared. The great object of these inquiries and 

 experiments is, on the one hand, by simplifying as much as pos- 

 sible the construction, and on the other, by contriving new and 

 cheaper means of execution, at length to reduce the expense 

 within those limits which a private individual may command. 



METEOROLOGICAL OBSERVATIONS FOR JULY 1843. 



Chiswick. — July 1. Overcast : clear. 2. Overcast throughout. 3. Fine. 4. 

 Uniform haze : very fine. 5. Sultry : very hot. 6, 7. Cloudy and fine. 8. Cloudy ; 

 rain : clear. 9. Foggy : very fine. 10. Cloudy and fine. 11. Thickly over- 

 cast. 12. Very fine. IS. Light haze : rain. 14. Densely overcast : very fine. 

 15 — 17. Very fine. 18. Very fine : constant heavy rain after 3 p.m. 19. Cloud- 

 less in the morning : cloudy at noon : clear. 20. Very fine : slight rain: over- 

 cast : rain at night. 21. Cloudy and fine. 22. Rain. 23. Cloudy and squally: 

 cold rain. 24. Clear : cloudy and fine : clear. 25. Overcast and fine : clear. 

 26. Overcast : slight rain. 27. Showery. 28. Cloudy and fine : rain. 29. Very 

 fine. 30. Cloudy and fine : clear. 31. Hazy : cloudy and fine : clear. — Mean 

 temperature of the month 1 0, 3 below the average. 



Boston. — July 1. Fine. 2. Fine: rain early a.m. 3. Windy. 4. Fine. 

 5. Cloudy: heat 81° '5 4 o'clock p.m. 6. Windy: rain early a.m. 7. Fine: 

 thunder-storm 5 p.m. : rainbow 6 p.m. 8. Rain : rain early a.m. : rain p.m. 

 9. Fine. 10. Cloudy. 11. Cloudy: rain p.m. 12. Fine: rain p.m. 13, 14. 

 Cloudy : rain early a.m. 15, 16. Fine. 17. Cloudy. 18. Windy: rain p.m. 

 19. Fine. 20. Fine : rain p. m. 21. Fine. 22. Cloudy : rain p.m. 23. Windy: 

 rain p.m. 24, 25. Fine. 26. Cloudy. 27. Windy : rain early a.m. 28. Cloudy. 



29. Cloudy: rain early a.m. 30. Cloudy: rain p.m. 31. Fine: rain, with 

 thunder and lightning p.m. 



Sand wick Manse, Orkney. — July 1. Bright: rain. 2. Drizzle. 3. Bright: 

 cloudy. 4. Bright: shower. 5. Bright: damp. 6. Thunder: fog : cloudy. 

 7. Bright: cloudy. S— 10. Bright: clear. 11. Clear. 12. Cloudy : damp. 

 13. Damp: cloudy. 14. Cloudy. 15, 16. Shower: cloudy. 17. Bright: 

 cloudy. 18, 19. Showery. 20. Rain: cloudy. 21. Bright: clear. 22. Bright: 

 cloudy. 23. Cloudy. 24. Bright: clear. 25. Bright : cloudy. 26. Cloudy: 

 showers. 27. Showers : cloudy. 28. Bright : cloudy. 29. Cloudy : rain. 



30, 31. Damp : drizzle. 



