A R 



to fee if the feeds will .crpw. When the plants come 



up, they muft be phiiued in feparate pots, filled with 



earth, and plunged into the bark-bed, after 

 v;hich they muft be treated like other tender plants 

 from tlie iame countries. 



light 



BAOBOB. 



See Adansonia. 



BARB A C A P R IE. See Spir^a. 



J 



Sec Anthyllis. 



BARB A R K A. See Erysimum. 

 B A R D A N A. See Arctium. 



BARLF^RIA. 



The name v/as given to this genus of plants by fa- 



who v/as a famous botaniit. 

 The Characters are. 



J 



// jMtb a pcrrnam 



/'-" 



L\/ 



Uvided into four pan 



, The fiower is of t. 



of cue kaf ftifincl-fiaped^ and divided tntofi 



fmaller^^ oppcftt. 



f'd: 



KV-'^ 



dcK-rn-ioard is divided into t-ivo. 



fegment beiyig broad and ere^l^ 

 er. and the under one which turns 



It hath four flender fla~ 



eA 



V ■ 



fi 



fi 



ZJ 



fi 



^ 



^, fupporting aflender Jlyle^ cro^vmd by a 

 ^I'be germen afterward becomes an oblongs 



ejfei 



fi 



difJj 



A R 



+ 



four feet high, are garnillied with two oval indented 

 leaves ftanding oppofite -, the flowers are fcarlet, and 

 are placed in whorls at the joints of the llalks ; theie 

 appear in July, Augufl, and September, and are 

 fucceeded by fliort puds inclofing flat feeds. 

 The roots of the firll Ibit will continue three or four 

 years,^ but after the fecond year, the plants grow too 

 rambling, and the lower part. of the branches are 

 naked. To are net fo fightly as the young plants j 

 therefore a fucceflion of thefe fliould be raifed, and 

 the old ones turned out. Tliey are propagated by 

 feeds, which will fow themfelves in the pots which 

 are near^ them in the ftove, when the plants are 

 once obtained i but where the feeds are received from 

 abroad, they mufl: be fown upon a hot-bed in the 

 fpring ; and when the plants are fit to remove, they 

 muft be each planted in a feparate pot, and pluno-cd 

 into a hot-bed of tanners bark, where they muftcon- 

 fcantly remiain, and managed in the fame manner as 

 other tender exotics from the fame countries ; giving 

 them water frequently in fiimmer, and letting the 

 frefli air to diem every day in warm weather, but in 

 winter they fliould have lefs water and be kept warm. 



They flower from June' to November, and their feeds 

 ripen foon after. 



The fecond fort liath flexible perennial ftalks, which 

 if cut ofi^ during the fummer months, and made into 

 lengths of fix or eight inches, and planted in pots, 

 plunging them into a hot-bed, and duly v/atered and 

 Ihadedfrom the fun, will foon nut out rooiq. fo mav 



This genus of plants is by Dr. Linn::£us ranged in the 



fecond order of his fov^teenth clals, titled Didy- 



namia Angiofpermia, whofe flowers have two long J be planted each in a fmall pot, and plunged into the 



and two ihort ftamina, and their feeds are included j tan-bed in the ftove'; for although this fort may be 



in a capfulc. 





The Species are, 



tfc 



is. _ 



'fide of the branches^ andfpcar-f: 



ithfp. 



E.irleria aculeata folani folio anguftiore flore ca^ruleo. 

 rium. N. G. 3!. 

 2. Barlhkia {Prionltis) fpinis axillaribus quaternis fohis 

 intcgerrimis. Ivin. Sp. Plant. 636. Barkriawith fpines 

 i^ro-zvin"^ by fours from the fide of the branches^ ard entire 

 "leaves. Coletta-veetla. Hort. Mai. o. p. 77. 



3 



4 



Barleria {Buxifolia) fpinis axillaribus oppofitis fo- 

 litaris, foliis fi-ibrotundis intcgerrimis. Lin. Sp. 887. 

 Bsirieria with fpines at the wings of the ft alky androundiflo 

 entire leaves, Barleria Americana fpinoflima frutefcens, 

 buxi folio parvo flore. Airim. Herb. 104. 



Barlkria {Cocciyiea) inermis foliis ovatis denticulatis 



-/ 



■>oiit fpines^ and 

 Barieria folani 



folio, flore coccineo. Plum. Nov, Gen. 31. 

 llie firft fort rifes with upright fquare ftalks tliree 

 feet hi^h, o-arniflied with two oblono; entire leaves 

 at every joint-, above which the flowers come out in 

 whorls furrcundirig the ftalks, and under each whorl 

 there are fix lliarp fpines, which are as long as the 

 empalement of the flowers. Thele joints are about 

 three inches diftance; the flowers are blue, and have 

 more of the form of the labiated flowers, than any 

 of the other Ipccies. I received this from Pa- 

 nama. 



The fecond fort has been long in the curious gardens 

 in Holland, but has not been many years in this 

 country. This fends out many flender ftems from 

 the root, which rife eight or nine feet high, garniftied 

 Vv'ieli oval pointed leaves, two growing oppofite at 

 er.ch joint, which are attended by four long fpines 

 ftanding crofs-ways. This plant hath not as yet flow- 

 tred in^England, though there are large plants of it 

 in the Chellea crarden. 



he third fort hath Ihrubby ftalks v/hich rife five or 

 fix feet hip-!i, o-arnifiied with roundifti endre leaves 

 jdnced oppofite, under which are placed ftrong. fpines-, 

 live flowers are produced in whorls toward tlie upper 

 part of the 





kept in a dry ftove through the winter, yet the plants 



will nbt grow near fo faft, nor will their leaves be fo 



. large as tliofe which are plunged into bark. By this 



method the plants may be propagated in plenty, but 



as they rarely produce flowers in England, fo two 



or three plants will be fufiicient to maintain the 

 fpecies, . ' ^ 



.' The third and fourth forts v/ill produce feeds in Eng- 

 land, provided the plants are kept in the tan-bed m 

 the ftove, fo thefe may be propagated by feeds, 

 which fiiould be fov/n in the hot-bed, and the plants 

 afterward treated in the fame manner as the firft 

 fort. 



BAROMETER [from B^V^, a weight, an-d />t£r;ov, 

 a meafure,] is an inftrument or machine for meafur- 

 ing the weight of the atmofphere, or the minute vari- 

 ation of the weight or prefllire of the incumbent air, 

 in order to determine the changes of v/cather. 

 This machine is founded on the Torricellian experi- 

 ment, fo called, from the inventor Torricellius. 

 li It confifts of a long tube of glafs, hermetically 

 fealed at one end ; and being filled with quickfilver, 

 is inverted fo as to have one end of it immero-ed in a 

 bafon of ftagnant quickfilver, and the odier iierme- 

 tically fealed, which is expofed to the preffureof the 



.' outward air; out of v/hich open end (after fuch im- 

 merfion) the quickfilver in the tube being fuffered to 

 run as much as it will into the ftagnant quickfilver, in 

 which that moudi or open end is immerled, there is 

 wont to remain a cylinder of quickfilver fufpended in 

 the tube, about twenty-eight, twenty-nine, or thirty 

 inches high, meafuring from the furface of the ftag- 

 nant quickfilver perpendicularly, but more or lefs 

 within fuch limits, according as the weight or pref- 

 fure of the air incumbent on the external ftagnant 





fialk % thefe are fucceeded by fiiort feed- 

 fielr. containing three or four Piat feeds. This grows 



tTiturally in Jamaica. 



1'hc fourth fort grows naturally in the warm pai-ts of 



An;erlca. Ih.e "ftalks of this are finooth j they rife 



quickfilver expofed to it, is greater or lefi^er, leaving 

 the upper part of the tube void, or at leaft empty of 

 common air. 



The phsenomena of the barometer are various, and 

 the caufes afligned for them, by feveral amhors, as 

 various ; nor is the ufe of it in prediding th.e wea- 

 ther, yet perfeftly afcertained. 



The greateft height the mercury has been known to" 

 ftand at in London, is thirty inches three-eighths, and 

 its leaft, twenty-eight inches : and though, as Mr. 

 Boyle obferves, the pha:nomena of the barometer are 

 fo very precarious, that it is very difficult to form 



any general rules about the rife and fall ihe;"egf5 fince 



\ 



