翻刻
驟。包＿二気￣ヲ于中＿一也。如＿三器￣二盛＿二氷雪＿一。外成＿二温潤＿一。非＿下￣スヤ極冷￣ト与＿二外
気＿一相激之徴＿上乎。若＿二夫￣ノ蜥蝪竜鱗之説＿一。則樵牧＿ノ市語￣ナリ也
雷電
問世謂￣ク雷之撃＿レ物也。電先￣二耀＿二其光＿一。而雷継＿レ之。似＿乙此￣レ
当＿下￣二有＿二￣テ二神＿一司＿上レ￣ル之。永￣ク無＿レ間者＿甲￣二。乃何＿－以春￣ハ則発￣シテ。而冬必
蔵￣ル乎。
曰雷￣ハ為＿二陽-気。而属＿レ火。春夏￣ハ地-気上升。日-行近＿二天頂＿一。《割書：人｜所＿レ》
《割書：居之地上。｜為＿二天之頂。》照＿レ地成＿レ熱。則有＿レ雷。日￣ハ為＿二火￣ノ母＿一。下火騰-踔￣シテ而
親。又挟＿二水土之気＿一。合-迸￣シテ衝￣テ逼＿二￣リ雲中＿一。都被＿二重-雲囲＿－￣ミ褁＿一。四-
囲冷湿之気。包＿レ火成＿レ団￣ヲ。然＿－￣ハ著￣テ勢＿－￣ヒ昌￣シ。旁-礴湧-沸￣シ。冷湿￣ハ亟￣二
【上部欄外注記】
澗？当
作潤
【左側】
欲＿二斂聚￣シテ而下。燥火￣ハ又欲迸-出￣シテ而上＿一。東￣二奔￣リ西撞。所＿－以￣ヘニ轟-
轟￣タル猛-勢相＿－逼￣テ搏-激￣シ。漲￣テ破＿二￣リ雲竅＿一。或如＿レ裂＿レ繒。或為＿二￣ス鳴＿レ￣シテ鼓而
成＿一レ￣コトヲ声也。而水土之気￣ハ。挟￣ミ帯￣フ微-質＿一。略如＿二￣シ硝炱＿一￣ノ。火-熱発-越￣シ。
適￣二映＿二￣シ。雲際＿一。逢＿二其質気＿一。閃￣テ為＿二電光＿一迅-疾如＿二金蛇＿一也。火-迸
土騰。土経＿二￣テ火錬￣一。凝-聚￣シテ成＿レ物￣ト。是￣ヲ為＿二劈靂之楔＿一矣然雷￣ト与＿レ
電同＿レ￣ス体。火気切＿レ雲。互￣二相摩-盪￣シテ。帯上￣ノ土気一-斉￣二点-著￣シ。乃
見＿二電光＿一。光-相入＿レ目￣二。即呈＿二￣ハシテ声気＿一￣ヲ入＿レ耳。少待＿二電光＿一之後。便￣チ
継＿二急雷＿一￣ヲ。此則聞＿レ￣二之遅速耳。或先￣二聞＿レ雷而無＿レ電者￣ハ。是燥
火之気。与＿レ雲周-旋￣シテ遇￣ヒ＿－合￣テ。亦能発＿レ￣シテ声。未＿二【左ルビ：ルナリ】曽然-火＿一也。或有＿レ
電無＿レ￣ク雷。雷声稍＿－疎￣トキハ。未＿二曽摩-盪＿一而火已￣二然￣ユルナリ也。夫雷￣二有＿二三
現代語訳
（前頁からの続き・雹の項）
急激に気を内部に包み込むのである。器に氷雪を盛れば外側が温かく湿るのは、極冷の気と外気が相互に激しくぶつかり合う証ではないか。蜥蜴（とかげ）や竜の鱗についての説は、樵や牧人の間で語られる世間話にすぎない。
雷電
問：世間では、雷が物を打つとき、電光がまずその光を輝かせ、雷がそれに続くという。これは、二柱の神がそれを司っているかのようである。それがずっと絶え間ないものならばよいが、なぜ春には発し、冬には必ず潜むのか。
答：雷は陽気であって火に属する。春夏には地気が上昇し、太陽が天頂（人の居る地上からすれば天の頂点）に近づき、地を照らして熱を生じる。すると雷が起こる。太陽は火の母であり、地の下の火が勢いよく跳び上がって親（太陽）に近づこうとする。また水と土の気を挟み、合わさって迸り、雲中へと突き進む。厚い雲に四方を囲まれ包まれると、四囲の冷たく湿った気が火を包んで団をなす。しかし（火は）勢いを得てさかんに燃え、あたりに広がり沸き立つ。冷湿の気はたちまち
（欄外注記：「澗」は「潤」と作るべきか）
（左側本文続き）
集まって下に降りようとし、乾いた火の気はまた外へ迸り出て上へ向かおうとする。東へ奔り西へ突き当たり、そのために轟轟たる猛烈な勢いが互いに迫り合い、打ち合い、漲って雲の穴を破る。ある時は絹を引き裂くようであり、ある時は鼓を鳴らすようにして音を成す。そして水土の気は微細な質（物質）を挟み帯びており、それはほぼ硝炱（硝石と煤）のようなものであって、火の熱が発し越え、雲際に映じるとき、その質気に逢って閃き、電光となること、金蛇のように迅疾である。火が迸り土が騰がり、土は火に錬られて凝り集まって物をなす。これを雷の楔（くさび・落雷石）とする。さて雷と電は体（本質）を同じくする。火気が雲を切り、互いに摩擦しぶつかり合って、帯びた土気が一斉に点じ著くと、すなわち電光が見える。光が目に入るとすぐに声気が耳に入る（ように感じる）。電光の後、少し待てば続いて急な雷鳴が来る。これは（光と音の）聞こえる遅速の差にすぎない。あるいは先に雷を聞いて電光のない場合は、乾いた火の気が雲と周旋（めぐり合わさり）して出合い、音を発することができても、いまだ火が燃えていないのである。あるいは電があって雷のない場合、雷鳴がやや疎ら（まばら）なときは、いまだ摩擦・衝突しないうちに火がすでに燃えているのである。そもそも雷には三
英語訳
(Continued from previous page — section on Hail)
It violently envelops the air within. Is not the moisture that forms on the outside of a vessel containing ice and snow a sign that extreme cold and the outer air are clashing against each other? As for the tales of lizards and dragon scales, these are nothing more than the idle talk of woodcutters and herdsmen in the marketplace.
Thunder and Lightning
Question: The world says that when thunder strikes an object, lightning first illuminates its light, and thunder follows after it. This seems as though two deities are in charge of it. If it were something entirely without cease, that would be one thing — but why does it arise in spring and invariably retreat in winter?
Answer: Thunder is yang-energy and belongs to fire. In spring and summer, the earth's energy ascends, the sun draws near the zenith of heaven (the zenith of heaven, from the perspective of the ground where people dwell, is the top of the sky above them), and as it illuminates the earth and generates heat, thunder occurs. The sun is the mother of fire; the fire below leaps upward vigorously to approach its parent. It also carries along the energies of water and earth, which together burst forth and press into the midst of the clouds. Surrounded and wrapped entirely by thick clouds on all sides, the cold and moist energy of the four quarters envelops the fire, forming a mass. Yet the fire gains power, blazes mightily, spreads outward and seethes. The cold and moist energy immediately
(Marginal note: "澗" [jiàn, a mountain stream] should perhaps be written as "潤" [rùn, moisture/dampness])
(Continuing on the left side)
wishes to gather and descend, while the dry fire energy strives to burst out and ascend. It rushes east and crashes west, and for this reason a tremendous, thundering violent force presses against itself and strikes in agitation, swells up, and breaks through the apertures of the clouds. Sometimes it is like the tearing of silk; sometimes it becomes sound like the beating of a drum. The energy of water and earth carries fine material particles, much like saltpeter and soot; when the heat of the fire surges and leaps out, projecting onto the boundary of the clouds, it encounters these material vapors, flashes, and becomes lightning — swift as a golden serpent. Fire bursts forth, earth rises, and the earth, having been refined by fire, congeals and gathers into a solid object. This is what is called the wedge [thunderbolt-stone] of the thunderclap. Now, thunder and lightning share the same fundamental nature. The fire-energy cuts through the clouds, mutually rubbing and surging against each other; the earth-energy carried along ignites all at once, and then lightning is seen. Light enters the eye; and simultaneously it seems as though the sound enters the ear. After the lightning, one waits a moment, and then rapid thunder follows. This is merely the difference in the speed with which they are perceived. If one hears thunder first but sees no lightning, this is because the dry fire energy, circling and meeting with the cloud, is able to produce sound without the fire having actually ignited yet. If there is lightning but no thunder, or the thunder-sound is somewhat sparse, it is because the fire has already ignited before any rubbing and collision has occurred. Now, thunder has three