HORTICULTURAL MAPS. 297 



was made to the Governor, ever been published, it is probable that these 

 maps would have been a portion of it. They were constructed bv Mr. 

 Warren Upham, late an assistant of the surrey, but they have been so 

 damaged by the smoke that pervaded the new science hall of the univer- 

 sity at the Are, last winter, that they are not fit for any use except to repro- 

 duce them for publication or for another exhibition. At the same time, 

 in case of reproduction for any purpose, they should be corrected in some 

 respects, to bring them up to date, because in the course of the later 

 investigations of the survey, some discoveries have been made in the 

 northern part of the state, which of course are not expressed by these 

 maps as they are now. They are briefly described as follows: 



1. A geological map, showing the areas of the formations, except the 

 drift and the cretaceous. 



2. The character and distribution of the glacial drift. This is divided 

 into morainic areas and gravel or clay plains, and the post-glacial al- 

 lurium. 



3. The sub-soils of the state, whether of clay or loam, or of gravel, or 

 of boulder- clay; also, whether of red boulder-clay or of blue. 



4. Contour-line map, (.colored,) to show those areas lower than 700 feet 

 above the sea, between 700 and 800 feet, and those higher than 800 feet 

 above the sea. 



5. Contour-line map, (colored,) to show the same areas for 900 feet 

 and 1,000 feet above the sea. 



6. Contour-line map, (colored,) to show the saire areas for 1,100 feet 

 and 1,200 feet above the sea. 



7. Contour-line map, (colored,) to show the same areas for 1,300 feet 

 and 1,400 feet above the sea. 



8. Contour-line map, (colored,) to show the same areas for 1,500 feet 

 and 1,600 feet above the sea. 



9. Contour-line map to show (by colored areas) those portions 1,700 feet 

 and 1,800 feet above the sea. 



10. Contour- line map to show (by colors) those areas below 1,900 feet, 

 those between 1,900 feet and 2,000 feet, and those above 2,000 feet above 

 the sea. 



11. Contour-line map showing, with intervals of 100 feet, in a condensed 

 manner, the entire topographic outline of the state, from 600 feet to over 

 2,C00 feet above the sea. 



12. Map showing the drainage basins of the state, and their compara- 

 tive areas. 



13. Map showing the distribution of the lakes of the state, the whole 

 area being divided between abundant lakes, scant lakes, and no lakes. 



14. Map showing the chief topographic features, viz:— the flats, the 

 undulating expanses and the rough and hilly portions. 



15. Map showing the distribution of the forest and prairie of the state 

 and the northern and southern limits of some of the trees. 



16. Map showing the mean annual rain-fall and its distribution over 

 the state. 



17. Map showing isotherms of mean temperature for the year. 



18. Map showing isotherms of mean temperature for January. 



19. Map showing isotherms of mean temperature for July. 



