Quarterly Horticultural Report. 187 



mode of protracting work upon paper after the completion of the actual 

 survey., occupies tlie appendix, and to the whole are added tables for the 

 convenient computation of barometrical measurements of altitude, conver- 

 sion of mean solar into sideral time, &c. 



This tract conveys more information upon the above subjects, within a 

 small compass, and at a lower cost, than any other extant. It will be 

 found extremely useful to scientific travellers, as well as to those who may 

 be occasionally called upon to employ instruments, with the use of which 

 practise has not rendered them faraiiiar. 



Should, when at a distance from the maker, any mishap befall an instrument, 

 the instructions here laid down will give the owner some chance of being 

 able to amend it. " But," as Mr. Trougliton observes, on concluding some 

 instructions of his own, " should these hints set any over-handy gentleman 

 on tormenting his instrument, it will not be what was intended by them ; 

 they were added, that in case of accident, those who are so unfortunate, 

 might be enabled thereby to put their own instrument in order." 



QUARTERLY HORTICULTURAL REPORT. 



Pklargonium Speculum Mundi is a seedling raised at the Nursery 

 from seed saved in 1833. This hybrid has been in bloom in very great 

 perfection, and has been much admired. Its flowers, which are from seven 

 to ten in each umbel, and measure above three inches across, are of a 

 purple crimson colour, elegantly and regularly reticulated over every part 

 of the petals of a darker hue. The flower stalks are erect and strong, and 

 able to support double their ordinary number of flowers. The leaves 

 somewhat kidney-shaped, are of a healthy green, and with every other 

 part of the plant covered with fine silky hair. The plant is of excellent 

 habit, and is probably among the most attractive of this now very numerous 

 genus. 



Amongst many other seedling pelargonia which have flowered this spring, 

 is one which has been named P. Splkndidissimum ; and as far as a judg- 

 ment can at present be formed from the seedling plant, it will be equally 

 worthy of cultivation with the former, though of a very different character. 

 Its flowers are of a bright rosy red, with two large black spots on the 

 upper petals. It is, however, better to defer giving a description of this 

 seedling until a second flowering has been witnessed. 



Passiflora Quaurangularis, or Granadilla f^ine. This plant, which 

 was put out in one of the pine stoves in the autumn of 1833, has grown 

 with great luxuriance, having at this time upwards of a dozen very large 

 fruits upon it, many of which measure between twenty-one and twenty- 

 two inches in circumference, which are now ripe, weighing from seven to 

 eight pounds each. 



Mr. Sabine describes the fruit (Horticultural Transactions) as "very 



