THRIPS. 



499 



TOOLS. 



flowered thorns, are deserving of special 



mention. 



Thrips. 



A small insect that infests and injures 

 the flowers, leaves, and shoots of plants, 

 causing them to appear spotted and warped 

 and twisted out of place. The best reme- 

 dies against thrips are the plentiful appli- 

 cation of tobacco water or strong soap 

 water, or any of the insecticides that are 

 sold for the purpose of destroying insect 

 life. 



Thu'ja (not. ord. Conif'erse). 



A splendid genus of hardy ornamental 

 shrubs ; the beautiful colour of their foliage, 

 combined with their symmetrical growth, 

 renders them desirable objects for lawns or 



eye, and T. alata alba, white, with rich 

 brown eye. They like a rich mould 

 plentifully mixed with well-rotted manure, 

 and are raised from seed and cutting 

 subjected to gentle bottom heat. 



Thyme. 



This can be increased by dividing the roots 

 and planting out the pieces in a bed about 

 4 inches apart, or it may be raised from 

 seed sown in light, rich soil in April. It 

 may also be propagated by rooted branches, 

 which may be pegged into the earth after 

 the manner of layers, and thus induced to 

 root. April is the month in which old 

 plants should be divided, and rooted 

 branches removed from the parent plant. 

 Lemon Thyme is a variety which should 



shrubberies ; they succeed 

 in any garden soil. Thuja 

 aurea variegata is an espe- 

 cial favourite. Of the Thuja, 

 or Arbor Vitse, genus, the 

 varieties are mostly of middle 

 size, varying in colour from 

 a bright yellowish-green to 

 golden. They are very 

 valuable in small gardens, 

 for contrast with shrubs of both a lighter j be cultivated in every garden on account of 

 and darker tint. They will grow in any | its delicious flavour, 

 common soil. 



A. PICK PROPER. 



B. PICK FOR GARDEN USE. 



Thunber'gia (not. ord. Acantha'ceae). 

 A genus of slender and rapid-growing 

 climbers, with extremely pretty and much- 

 admired flowers, which are freely pro- 

 duced, either when grown in the green- 

 house or in a warm situation out of 

 doors : they delight in rich loamy soil. 

 Most of the varieties are half-hardy 

 annuals, but Thunbergia coccinea may be 

 named as a greenhouse perennial, and 

 blooms in clusters or racemes of orange- 



Tools for Loosening Soil Pick. 



This tool is a bent, or compound lever, 

 when regarded as a mechanical power, as 

 may be seen when it is employed in 

 lifting a paving stone, for example. The 

 paving stone then is the weight to be 

 raised, and is at one end of the short 

 arm of the lever, which is formed of that 

 part of the head which lies between the 

 extreme point and the socket in which 

 the handle is set. The handle itself forms 

 the other arm of the lever, the ground on 



red flowers. Among the annuals may be which the head rests is the fulcrum, and 

 named T. alata, orange, with rich brown the power is the pressure applied at the 



